Artikel Biologi kelas 11 ini akan membahas tentang struktur sel tumbuhan dan hewan disertai fungsinya masing-masing. Yuk, siapkan buku catatanmu!
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Coba deh kamu flashback waktu SD dulu, terus lihat diri kamu sekarang. Satu hal yang paling jelas terlihat berbeda adalah tinggi kamu, betul nggak?
Pertambahan tinggi badan seseorang itu salah satu faktor karena sel di dalam tubuh mengalami peningkatan. Tanpa sadar, sebenarnya sel akan melakukan pembelahan dan terus bekerja untuk memperbaiki sel-sel yang rusak.
Secara kasat mata, kita nggak bisa melihat mereka kerja. Ya iyalah… sel itu kan unit terkecil penyusun tubuh makhluk hidup, jumlahnya juga banyak dan bervariasi.
Baca Juga: Lumut: Pengertian, Ciri-Ciri, Manfaat & Klasifikasinya
Untuk tahu lebih jauh tentang sel-sel tersebut, kamu harus kenalan dulu nih, dengan struktur sel. Secara umum, struktur sel itu ada dua: struktur sel prokariot dan sel eukariot. Sel prokariot ini tidak memiliki nukleus, sedangkan sel eukariot memiliki nukleus. Nah, sekarang, kita coba bahas tentang struktur sel eukariot, yuk!
Sel itu terdiri dari beberapa bagian, dan bagian-bagian sel inilah yang dinamakan dengan struktur sel. Struktur sel ada bagian luar dan bagian dalam. Kita coba lihat contoh struktur sel pada hewan dan tumbuhan berikut ini, ya!
Baca Juga: Mengenal Jenis dan struktur Sel pada Makhluk Hidup
a. Struktur Sel Hewan
Pertama, contoh struktur sel hewan dulu. Perhatikan gambar sel hewan beserta strukturnya berikut ini:
b. Struktur Sel Tumbuhan
Selanjutnya, ada contoh struktur sel tumbuhan. Perhatikan gambar sel tumbuhan beserta strukturnya berikut ini:
Nah, kalau kamu perhatikan, pada bagian luar sel, ada membran sel dan dinding sel. Bagian dalamnya ada protoplasma. Kemudian, di protoplasma terbagi lagi menjadi 3 bagian, yaitu nukleus, sitoplasma, dan sitoskeleton.
Kita bahas dari membran sel dulu, yuk!
Membran Sel atau Membran Plasma
Membran sel atau membran plasma merupakan struktur yang dimiliki oleh semua sel makhluk hidup. Baik kelompok hewan, tumbuhan, jamur, bakteri, arkaea dan protista.
Baca Juga: Mengenal Macam-Macam Organel Sel beserta Fungsinya
Membran sel bisa dianalogikan sebagai kantong plastik. Kantong plastik itu kan bisa membungkus semua barang belanjaan kamu, nah sama halnya dengan membran.
Membran sel adalah lapisan terluar yang membungkus dan menjaga komponen sel di dalamnya. Lapisan membran sel disusun dari senyawa-senyawa kimia. Mulai dari lipid (fosfolipid), protein, sampai karbohidrat. Nah, gimana sih bentuk membran sel itu?
Oh ya, kamu juga harus tahu, nih! Walaupun membran sel menjadi lapisan terluar sel pada kebanyakan makhluk hidup, tapi, untuk tumbuhan dan jamur, membran sel terletak sebelum dinding sel.
Sifat membran sel yaitu semipermeabel karena adanya stuktur fosfolipid. Semipermeabel adalah sifat membran sel di mana hanya zat tertentu saja yang boleh masuk ke dalam sel.
Dinding Sel
Berbeda dengan membran sel yang dimiliki oleh setiap makhluk hidup, dinding sel hanya dimiliki oleh tumbuhan dan jamur. Dinding sel inilah yang membuat tumbuhan menjadi unik dan berbeda dengan sel hewan.
Dinding sel juga loh, yang ngebuat tumbuhan nggak bergerak bebas alias kaku, tapi inget yaa walaupun kelihatannya tumbuhan diem aja bukan berarti dia nggak bergerak. Pergerakan tumbuhan itu nggak berpindah posisi atau namanya gerak pasif.
Struktur dinding sel ada primer dan sekunder. Letak dinding sel primer di antara lamela tengah dan dinding sel sekunder. Oh ya, kamu juga harus tau, walaupun namanya lamela tengah tapi bukan berarti letaknya di tengah yaa. Lamela tengah merupakan lapisan terluar dari dinding sel dan banyak mengandung pektin.
Oke, balik lagi nih bahas dinding sel primer, ada beberapa kandungan di dalam dinding sel primer seperti hemiselulosa, selulosa (kadarnya rendah), lipid dan protein. Dinding sel primer lebih fleksibel dan tipis karena dinding sel terbentuk saat sel membelah.
Selanjutnya, sel mengalami penebalan (karena adanya zat lignin) dan terbentuklah dinding sel sekunder. Makanya tekstur dinding sel sekunder tebal, kaku dan juga kuat. Kandungan di dinding sel sekunder nggak cuma zat lignin tapi ada juga yaitu selulosa dan hemiselulosa.
Beberapa fungsi dinding sel, yaitu sebagai pelindung komponen di dalam sel, yang memberikan bentuk sel, bantu jaga keseimbangan cairan (regulasi osmotik), dan juga mencegah sel kehilangan air.
Protoplasma
Tadi kan membran sel dianalogikan sebagai kantong plastik, nahh semua barang yang ada di kantong itu adalah protoplasmanya. Jadi, protoplasma maksudnya semua bahan yang mengisi bagian dalam sel.
Protoplasma ini letaknya di dalam dan mengelilingi membran sel. Jadi, protoplasma mengandung senyawa-senyawa kimia kayak organik dan anorganik. Nah, komponen kimiawi pada sel udah pernah dibahas juga loh, cek cek aja ya!
Selain komponen kimiawi, protoplasma juga terdiri dari 3 bagian utama:
a. Nukleus (Inti Sel)
Sesuai namanya “inti”, jadi nukleus itu bagian terpenting di sel karena nukleus mengatur seluruh aktivitas sel. Di dalam nukleus juga ada beberapa komponen penting seperti anak inti (nukleolus), cairan dalam inti (nukleoplasma), membran inti (karioteka) dan benang-benang kromatin atau kromosom. Setiap komponen punya tugasnya masing-masing.
Membran inti atau karioteka, letaknya paling luar dari inti sel. Nah, di karioteka ini ada pori-pori. Tugas karioteka sebagai tempat pertukaran zat dengan sitoplasma. Selanjutnya anak inti atau nukleolus, fungsinya untuk membentuk rRNA yang nantinya akan menyusun ribosom.
Di inti sel juga ada cairan kental dan transparan atau disebut nukleoplasma. Fungsinya sebagai tempat terjadinya reaksi-reaksi kimia dalam nukleus. Bagian terakhir yaitu kromosom yang terdiri dari 2 kata, kroma yaitu warna dan soma yaitu benang halus dengan fungsi membentuk DNA.
Komponen-komponen itu saling bekerja sama, sampai akhirnya nukleus bisa menjalankan fungsinya, yaitu:
- Mengendalikan proses berlangsungnya metabolisme dalam sel
- Menyimpan informasi genetik (ini pada kromosom yang membentuk DNA)
- Sebagai pusat sintesis asam nukleat, DNA dan RNA.
- Mengontrol pertumbuhan sel
- Tempat penyimpanan protein.
b. Sitoplasma
Cairan dalam sel yang letaknya di antara nukleus sama membran plasma, namanya sitoplasma. Nah, sitoplasma itu ada dua komponen penyusunnya: sitosol dan organel-organel.
Kalo sitosol itu bagian cair dari sitoplasma yang mengelilingi organel. Jadi, ada 70-90% air yang di dalamnya juga mengandung zat-zat terlarut.
Zat-zat terlarut itu kayak protein, lipid, dan zat sisa lainnya misalnya karbondioksida. Sitosol fungsinya sebagai tempat reaksi kimia loh, contoh reaksi kimianya itu glikolisis. Selain sitosol, di sitoplasma juga ada organel kan, nah karena organel-organel sel ada banyak, jadi bakal dibahas terpisah dari struktur sel.
Oke, tadi udah bahas sitosol lengkap sama fungsinya. Trus, kalo fungsi sitoplasma sendiri apa dong? wah ada banyak, nih ingat baik yaa!
- Sebagai tempat berlangsungnya reaksi kimia,
- Menyimpan berbagai jenis zat kimia yang digunakan untuk proses metabolisme sel
- Pelarut untuk semua protein dan senyawa dalam sel
- Perantara transfer bahan dari luar sel ke organel atau inti sel
Baca Juga: Tahapan Sintesis Protein
Oke, sekarang kamu udah tau kan, perbedaan sitoplasma dan sitosol? Kalau sitosol itu cairannya tanpa ada organel, sedangkan sitoplasma ada organel. Jangan kebalik lagi, ya!
c. Sitoskeleton
Lanjut nih, kamu tau nggak sih bentuk sel itu didapat dari mana? Yap jawabannya sitoskeleton!
Dari namanya, sitoskeleton terdiri dari 2 kata yaitu sito yang artinya sel, dan skeleton yang artinya rangka. Jadi, sitoskeleton itu adalah rangka sel yang berbentuk benang-benang halus atau filamen-filamen protein dan menyebar di sitosol.
Nggak cuma ngasih bentuk, sitoskeleton juga berfungsi untuk mengatur pergerakan yang ada di dalam sel dan mempertahankan organel-organel sel untuk tetap stay di tempatnya masing-masing.
Nah, yang nggak kalah penting nih, sitoskeleton terbagi jadi 3 jenis, yaitu mikrofilamen, filamen intermediet, dan mikrotubulus.
Lapisan paling tipis yaitu mikrofilamen, dan letaknya di pinggir sel. Di dalam mikrofilamen ada protein aktin, yang nantinya akan berikatan dengan miosin, sehingga terjadi kontraksi otot untuk pergerakan.
Kalau lapisan yang ketebalannya sedang, yaitu filamen intermediet. Filamen intermediet tersebar di sitosol, dan fungsinya untuk mempertahankan bentuk sel.
Terakhir, ada mikrotubulus. Mikrotubulus menjadi lapisan yang paling tebal dan tersusun dari protein tubulus. Fungsinya untuk menggerakan organel, pembentukan silia, flagel.
Baca Juga: Maksimalkan Proses Reproduksi Sel dengan Berpuasa
Itu dia tadi, struktur sel dengan komponen-komponen sel yang ada di dalamnya dan wajib banget kamu tau. Nah, untuk mempermudah kamu membedakan struktur sel yang ada di sel hewan dan sel tumbuhan, langsung aja perhatiin tabel di bawah ini!
Materi di struktur sel ini memang cukup banyak, jadi kamu harus sering baca-baca lagi. Nah, supaya pemahaman kamu lebih mantap mendingan sekarang juga kamu ke ruangbelajar. Jangan lupa bahas-bahas soal dan semangat belajar~
Referensi:
Bob dan Joko, (2019). Fokus Belajar Intisari Biologi untuk SMA/MA. Jakarta: Duta.
Husnul dan Rissa, (2014). Yuk Kebut Semalam Kuasai Biologi SMA/MA Kelas 10, 11, dan 12. Jakarta: e-prim.
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<h1 class="content-title">
Struktur Sel Tumbuhan & Hewan beserta Fungsinya | Biologi Kelas 11 </h1>
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<p class="content-author"><a href="https://www.ruangguru.com/blog/author/kak-efira-mt-saintek" class="">Kak Efira MT Saintek</a> </p>
<p class="content-info"><span>July 3, 2025 • </span> <span>7 minutes read</span></p>
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<p style="text-align: justify;"><img decoding="async" class="aligncenter" style="width: 820px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Struktur-Struktur%20Sel%20Beserta%20Fungsinya.jpg" alt="Struktur-Struktur Sel Beserta Fungsinya" width="820" /></p>
<blockquote>
<p style="text-align: center; font-size: 16px;"><em><strong><a href="https://www.ruangguru.com/blog/c/biologi/biologi-sma-kelas-11">Artikel </a><a href="https://www.ruangguru.com/blog/c/biologi/biologi-sma-kelas-11">Biologi kelas 11</a></strong> ini akan membahas tentang struktur sel tumbuhan dan hewan disertai fungsinya masing-masing. Yuk, siapkan buku catatanmu!</em></p>
<p style="text-align: center; font-size: 16px;"><em>—</em></p>
</blockquote>
<p> </p>
<p style="text-align: justify;">Coba deh kamu <em>flashback</em> waktu SD dulu, terus lihat diri kamu sekarang. Satu hal yang paling jelas terlihat berbeda adalah tinggi kamu, betul nggak?</p>
<p style="text-align: justify;">Pertambahan tinggi badan seseorang itu salah satu faktor karena sel di dalam tubuh mengalami peningkatan. Tanpa sadar, sebenarnya sel akan melakukan pembelahan dan terus bekerja untuk memperbaiki sel-sel yang rusak.</p>
<p style="text-align: justify;">Secara kasat mata, kita nggak bisa melihat mereka kerja. Ya iyalah… sel itu kan unit terkecil penyusun tubuh makhluk hidup, jumlahnya juga banyak dan bervariasi.</p>
<p><strong>Baca Juga: <a href="/blog/ciri-dan-manfaat-lumut" rel="noopener">Lumut: Pengertian, Ciri-Ciri, Manfaat & Klasifikasinya</a></strong></p>
<p style="text-align: justify;">Untuk tahu lebih jauh tentang sel-sel tersebut, kamu harus kenalan dulu nih, dengan struktur sel. Secara umum, struktur sel itu ada dua: struktur sel prokariot dan sel eukariot. Sel prokariot ini tidak memiliki nukleus, sedangkan sel eukariot memiliki nukleus. Nah, sekarang, kita coba bahas tentang struktur sel eukariot, yuk!</p>
<p> </p>
<h2><span style="font-size: 18pt;">Struktur Sel</span></h2>
<p style="text-align: justify;">Sel itu terdiri dari beberapa bagian, dan bagian-bagian sel inilah yang dinamakan dengan struktur sel. Struktur sel ada <span style="font-weight: bold;">bagian luar dan bagian dalam</span>. Kita coba lihat contoh struktur sel pada hewan dan tumbuhan berikut ini, ya!</p>
<p><strong>Baca Juga: <a href="/blog/mengenal-jenis-dan-struktur-sel-pada-makhluk-hidup" rel="noopener">Mengenal Jenis dan struktur Sel pada Makhluk Hidup</a></strong></p>
<p> </p>
<h3><span style="font-size: 14pt;">a. Struktur Sel Hewan</span></h3>
<p style="text-align: justify;">Pertama, contoh struktur sel hewan dulu. Perhatikan gambar sel hewan beserta strukturnya berikut ini:</p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Gambar%20Sel%20Hewan.jpg" alt="Gambar Struktur Sel Hewan" width="600" /></p>
<p> </p>
<h3><span style="font-size: 14pt;">b. Struktur Sel Tumbuhan</span></h3>
<p style="text-align: justify;">Selanjutnya, ada contoh struktur sel tumbuhan. Perhatikan gambar sel tumbuhan beserta strukturnya berikut ini:</p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Gambar%20Sel%20Tumbuhan.jpg" alt="Gambar Struktur Sel Tumbuhan" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Nah, kalau kamu perhatikan, pada bagian luar sel, ada <span style="font-weight: bold;">membran sel dan dinding sel</span>. Bagian dalamnya ada <span style="font-weight: bold;">protoplasma</span>. Kemudian, <span style="font-weight: normal;">di protoplasma terbagi lagi menjadi 3 bagian, yaitu</span><strong> nukleus, sitoplasma, dan sitoskeleton</strong>.</p>
<p style="text-align: justify;">Kita bahas dari membran sel dulu, yuk!</p>
<p> </p>
<h2><span style="font-size: 18pt;">Membran Sel atau Membran Plasma</span></h2>
<p style="text-align: justify;">Membran sel atau membran plasma merupakan struktur yang dimiliki oleh semua sel makhluk hidup. Baik kelompok hewan, tumbuhan, jamur, bakteri, arkaea dan protista.</p>
<p><strong>Baca Juga: <a href="/blog/organel-sel-dan-fungsinya" rel="noopener">Mengenal Macam-Macam Organel Sel beserta Fungsinya</a></strong></p>
<p style="text-align: justify;">Membran sel bisa dianalogikan sebagai kantong plastik. Kantong plastik itu kan bisa membungkus semua barang belanjaan kamu, nah sama halnya dengan membran.</p>
<p style="text-align: justify;"><strong>Membran sel adalah lapisan terluar yang membungkus dan menjaga komponen sel di dalamnya</strong>. Lapisan membran sel disusun dari senyawa-senyawa kimia. Mulai dari lipid (fosfolipid), protein, sampai karbohidrat. Nah, gimana sih bentuk membran sel itu?</p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Gambar%20Membran%20Sel%20dan%20Fungsinya.jpg" alt="Gambar Struktur Membran Sel dan Fungsinya" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Oh ya, kamu juga harus tahu, nih! Walaupun membran sel menjadi lapisan terluar sel pada kebanyakan makhluk hidup, tapi, untuk tumbuhan dan jamur, membran sel terletak sebelum dinding sel.</p>
<p style="text-align: justify;">Sifat membran sel yaitu<strong> semipermeabel</strong><span style="font-weight: normal;"> karena adanya stuktur fosfolipid</span><span style="font-weight: normal;">.</span> Semipermeabel adalah sifat membran sel di mana hanya zat tertentu saja yang boleh masuk ke dalam sel.</p>
<p> </p>
<h2><span style="font-size: 18pt;">Dinding Sel</span></h2>
<p style="text-align: justify;">Berbeda dengan membran sel yang dimiliki oleh setiap makhluk hidup, <strong>dinding sel hanya dimiliki oleh tumbuhan dan jamur. </strong>Dinding sel inilah yang membuat tumbuhan menjadi unik dan berbeda dengan sel hewan.</p>
<p style="text-align: justify;">Dinding sel juga loh, yang ngebuat tumbuhan nggak bergerak bebas alias kaku, tapi inget yaa walaupun kelihatannya tumbuhan diem aja bukan berarti dia nggak bergerak. Pergerakan tumbuhan itu nggak berpindah posisi atau namanya gerak pasif.</p>
<p style="text-align: justify;">Struktur dinding sel ada primer dan sekunder. Letak dinding sel primer di antara lamela tengah dan dinding sel sekunder. Oh ya, kamu juga harus tau, walaupun namanya lamela tengah tapi bukan berarti letaknya di tengah yaa. Lamela tengah merupakan lapisan terluar dari dinding sel dan banyak mengandung pektin.</p>
<p style="text-align: justify;">Oke, balik lagi nih bahas dinding sel primer, ada beberapa kandungan di dalam dinding sel primer seperti hemiselulosa, selulosa (kadarnya rendah), lipid dan protein. Dinding sel primer lebih fleksibel dan tipis karena dinding sel terbentuk saat sel membelah.</p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Gambar%20Struktur%20Dinding%20Sel%20Tumbuhan.jpg" alt="Gambar Struktur Dinding Sel Tumbuhan" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Selanjutnya, sel mengalami penebalan (karena adanya zat lignin) dan terbentuklah dinding sel sekunder. Makanya tekstur dinding sel sekunder tebal, kaku dan juga kuat. Kandungan di dinding sel sekunder nggak cuma zat lignin tapi ada juga yaitu selulosa dan hemiselulosa.</p>
<p style="text-align: justify;">Beberapa fungsi dinding sel, yaitu sebagai pelindung komponen di dalam sel, yang memberikan bentuk sel, bantu jaga keseimbangan cairan (regulasi osmotik), dan juga mencegah sel kehilangan air.</p>
<p> </p>
<h2><span style="font-size: 18pt;">Protoplasma</span></h2>
<p style="text-align: justify;">Tadi kan membran sel dianalogikan sebagai kantong plastik, nahh semua barang yang ada di kantong itu adalah protoplasmanya. Jadi, protoplasma maksudnya semua bahan yang mengisi bagian dalam sel.</p>
<p style="text-align: justify;">Protoplasma ini letaknya di dalam dan mengelilingi membran sel. Jadi, protoplasma mengandung senyawa-senyawa kimia kayak organik dan anorganik. Nah, <strong><a href="/blog/apa-saja-komponen-kimiawi-dalam-sebuah-sel" rel="noopener">komponen kimiawi pada sel</a></strong> udah pernah dibahas juga loh, cek cek aja ya!</p>
<p style="text-align: justify;">Selain komponen kimiawi, protoplasma juga terdiri dari 3 bagian utama:</p>
<p> </p>
<h3><span style="font-size: 14pt;">a. Nukleus (Inti Sel)</span></h3>
<p style="text-align: justify;"><span style="text-align: justify; background-color: transparent;">Sesuai namanya “</span><strong style="text-align: justify; background-color: transparent;">inti</strong><span style="text-align: justify; background-color: transparent;">”, jadi nukleus itu bagian terpenting di sel karena nukleus mengatur seluruh aktivitas sel. Di dalam nukleus juga ada beberapa komponen penting seperti anak inti (nukleolus), cairan dalam inti (nukleoplasma), membran inti (karioteka) dan benang-benang kromatin atau kromosom. Setiap komponen punya tugasnya masing-masing.</span></p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Gambar%20Nukleus.jpg" alt="Gambar Nukleus" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Membran inti atau <strong>karioteka, letaknya paling luar dari inti sel</strong>. Nah, di karioteka ini ada pori-pori. <strong>Tugas karioteka sebagai tempat pertukaran zat dengan sitoplasma.</strong> Selanjutnya anak inti atau <strong>nukleolus, fungsinya untuk membentuk rRNA yang nantinya akan menyusun ribosom</strong>.</p>
<p style="text-align: justify;">Di inti sel juga ada cairan kental dan transparan atau disebut <strong>nukleoplasma. Fungsinya sebagai tempat terjadinya reaksi-reaksi kimia dalam nukleus.</strong> Bagian terakhir yaitu <strong>kromosom</strong> yang terdiri dari 2 kata, kroma yaitu warna dan soma yaitu benang halus dengan <strong>fungsi membentuk DNA</strong><span style="font-weight: normal;">.</span></p>
<p style="text-align: justify;">Komponen-komponen itu saling bekerja sama, sampai akhirnya nukleus bisa menjalankan fungsinya, yaitu:</p>
<ul style="text-align: justify;">
<li aria-level="1">Mengendalikan proses berlangsungnya metabolisme dalam sel</li>
<li aria-level="1">Menyimpan informasi genetik (ini pada kromosom yang membentuk DNA)</li>
<li aria-level="1">Sebagai pusat sintesis asam nukleat, DNA dan RNA.</li>
<li aria-level="1">Mengontrol pertumbuhan sel</li>
<li aria-level="1">Tempat penyimpanan protein.</li>
</ul>
<p> </p>
<h3><span style="font-size: 14pt;">b. Sitoplasma</span></h3>
<p style="text-align: justify;"><strong>Cairan dalam sel yang letaknya di antara nukleus sama membran plasma, namanya sitoplasma</strong>. Nah, sitoplasma itu ada dua komponen penyusunnya: sitosol dan organel-organel.</p>
<p style="text-align: justify;">Kalo <strong>sitosol itu bagian cair dari sitoplasma yang mengelilingi organel. </strong>Jadi, ada 70-90% air yang di dalamnya juga mengandung zat-zat terlarut.</p>
<p style="text-align: justify;">Zat-zat terlarut itu kayak protein, lipid, dan zat sisa lainnya misalnya karbondioksida. Sitosol fungsinya sebagai tempat reaksi kimia loh, contoh reaksi kimianya itu glikolisis. Selain sitosol, di sitoplasma juga ada organel kan, nah karena organel-organel sel ada banyak, jadi bakal dibahas terpisah dari struktur sel.</p>
<p style="text-align: justify;">Oke, tadi udah bahas sitosol lengkap sama fungsinya. Trus, kalo fungsi sitoplasma sendiri apa dong? wah ada banyak, nih ingat baik yaa!</p>
<ul style="text-align: justify;">
<li aria-level="1">Sebagai tempat berlangsungnya reaksi kimia,</li>
<li aria-level="1">Menyimpan berbagai jenis zat kimia yang digunakan untuk proses metabolisme sel</li>
<li aria-level="1">Pelarut untuk semua protein dan senyawa dalam sel</li>
<li aria-level="1">Perantara transfer bahan dari luar sel ke organel atau inti sel</li>
</ul>
<p> </p>
<p><strong>Baca Juga: <a href="/biologi-kelas-11-tahapan-sintesis-protein" rel="noopener">Tahapan Sintesis Protein</a></strong></p>
<p style="text-align: justify;">Oke, sekarang kamu udah tau kan, perbedaan sitoplasma dan sitosol? Kalau sitosol itu cairannya tanpa ada organel, sedangkan sitoplasma ada organel. Jangan kebalik lagi, ya!</p>
<p> </p>
<h3><span style="font-size: 14pt;">c. Sitoskeleton</span></h3>
<p style="text-align: justify;"><span style="text-align: justify; background-color: transparent;">Lanjut nih, kamu tau nggak sih bentuk sel itu didapat dari mana? Yap jawabannya sitoskeleton! </span></p>
<p style="text-align: justify;"><span style="text-align: justify; background-color: transparent;">Dari namanya, sitoskeleton terdiri dari 2 kata yaitu sito yang artinya sel, dan skeleton yang artinya rangka. </span><strong style="text-align: justify; background-color: transparent;">Jadi, sitoskeleton itu adalah rangka sel yang berbentuk benang-benang halus atau filamen-filamen protein dan menyebar di sitosol.</strong></p>
<p style="text-align: justify;"><span style="text-align: justify; background-color: transparent;">Nggak cuma ngasih bentuk, </span><strong style="text-align: justify; background-color: transparent;">sitoskeleton juga berfungsi untuk mengatur pergerakan yang ada di dalam sel dan mempertahankan organel-organel sel untuk tetap </strong><strong style="text-align: justify; background-color: transparent;"><em>stay</em></strong><strong style="text-align: justify; background-color: transparent;"> di tempatnya masing-masing</strong><span style="text-align: justify; background-color: transparent;">. </span></p>
<p style="text-align: justify;"><span style="text-align: justify; background-color: transparent;">Nah, yang nggak kalah penting nih, sitoskeleton terbagi jadi 3 jenis, yaitu mikrofilamen, filamen intermediet, dan mikrotubulus. </span></p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Gambar%20Struktur%20Dinding%20Sel%20Hewan.jpg" alt="Gambar Struktur Dinding Sel Hewan" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Lapisan paling tipis yaitu mikrofilamen, dan letaknya di pinggir sel. Di dalam mikrofilamen ada protein aktin, yang nantinya akan berikatan dengan miosin, sehingga terjadi kontraksi otot untuk pergerakan.</p>
<p style="text-align: justify;">Kalau lapisan yang ketebalannya sedang, yaitu filamen intermediet. Filamen intermediet tersebar di sitosol, dan fungsinya untuk mempertahankan bentuk sel.</p>
<p style="text-align: justify;">Terakhir, ada mikrotubulus. Mikrotubulus menjadi lapisan yang paling tebal dan tersusun dari protein tubulus. Fungsinya untuk menggerakan organel, pembentukan silia, flagel.</p>
<p><strong>Baca Juga: <a href="/blog/manfaat-puasa-bisa-reproduksi-sel" rel="noopener">Maksimalkan Proses Reproduksi Sel dengan Berpuasa</a></strong></p>
<p style="text-align: justify;">Itu dia tadi, struktur sel dengan komponen-komponen sel yang ada di dalamnya dan wajib banget kamu tau. Nah, untuk mempermudah kamu membedakan struktur sel yang ada di sel hewan dan sel tumbuhan, langsung aja perhatiin tabel di bawah ini!</p>
<p style="text-align: justify;"><img decoding="async" style="width: 600px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Perbedaan%20Sel%20Hewan%20dan%20Tumbuhan.jpg" alt="Perbedaan Sel Hewan dan Sel Tumbuhan" width="600" /></p>
<p> </p>
<p style="text-align: justify;">Materi di struktur sel ini memang cukup banyak, jadi kamu harus sering baca-baca lagi. Nah, supaya pemahaman kamu lebih mantap mendingan sekarang juga kamu ke <strong><a href="https://www.ruangguru.com/ruangbelajar" target="_blank" rel="noopener">ruangbelajar</a></strong>. Jangan lupa bahas-bahas soal dan semangat belajar~</p>
<p><a href="https://www.ruangguru.com/ruangbelajar"><img decoding="async" class="aligncenter size-medium" src="https://cdn-web-2.ruangguru.com/landing-pages/assets/a2dbab8e-e903-4b70-ae04-39ff5807647e.jpg" alt="CTA ruangbelajar" width="820" /></a></p>
<p style="text-align: justify;"><strong>Referensi:</strong></p>
<p style="text-align: left;">Bob dan Joko, (2019). <em>Fokus Belajar Intisari Biologi untuk SMA/MA</em>. Jakarta: Duta.</p>
<p style="text-align: left;">Husnul dan Rissa, (2014). <em>Yuk Kebut Semalam Kuasai Biologi SMA/MA Kelas 10, 11, dan 12</em>. Jakarta: e-prim.</p>
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</nav>
</div>
</div>
</div>
</div>
<div class="d-lg-none text-center">
<nav class="footer-menu social">
<p class="title">Ikuti Kami</p>
<a target="_blank" href="https://www.instagram.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/instagram.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/instagram.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/instagram.png" loading="lazy" alt="Logo Instagram Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.facebook.com/ruanggurucom/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/facebook.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/facebook.png" loading="lazy" alt="Logo Facebook Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://twitter.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/twitter.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/twitter.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/twitter.png" loading=" lazy" alt="Logo Twitter Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.youtube.com/ruangguru">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/youtube.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/youtube.png" loading=" lazy" alt="Logo Youtube Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.linkedin.com/company/ruangguru-com">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/linkedin.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/linkedin.png" loading=" lazy" alt="Logo LinkedIn Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.tiktok.com/@ruangguru">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/tiktok.png?height=60&convert=webp" type="image/webp">
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</picture>
</a>
</nav>
</div>
<p class="footer-copyright">
© 2026 All Rights Reserved PT. Ruang Raya Indonesia
</p>
</div>
<style>
.bantuan-container {
position: relative;
}
.bantuan-element {
position: fixed;
z-index: 999;
display: flex;
align-items: flex-end;
justify-content: flex-end;
cursor: pointer;
transition: all 0.6s ease;
}
.bantuan-top {
bottom: 11rem;
right: 2rem;
}
.bantuan-bottom {
bottom: 2rem;
right: 2rem;
}
.bantuan-top-2 {
bottom: 15rem;
right: 2rem;
}
.bantuan-top-3 {
bottom: 19rem;
right: 2rem;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 2rem;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 2rem;
}
@media (min-width: 768px) {
.bantuan-element img {
width: auto;
transition: all 0.4s ease;
}
.bantuan-top img {
width: 140px;
}
.bantuan-bottom img {
width: 140px;
}
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 140px;
}
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 140px;
}
.bantuan-element.clicked {
bottom: 9rem;
right: 2.5rem;
}
.bantuan-element.clicked img {
width: auto;
height: 64px;
}
}
@media (max-width: 767px) {
.bantuan-top {
bottom: 8rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom {
bottom: 2rem;
right: 1.25rem;
align-items: center;
}
.bantuan-top-2 {
bottom: 12rem;
right: 1rem;
align-items: center;
}
.bantuan-top-3 {
bottom: 16rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 1.25rem;
align-items: center;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 1.25rem;
align-items: center;
}
.bantuan-element img {
width: auto;
}
.bantuan-top img,
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 96px;
}
.bantuan-bottom img,
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 96px;
}
}
.bantuan-element:hover {
transform: scale(1.05);
}
.bantuan-element img {
max-width: 100%;
height: auto;
}
</style>
<div id="bantuan-divs-container" style="position: relative" data-product="ruangguru" data-table="rg_floating_icon"></div>
<script>
class FloatingDivsComponent {
constructor(product = 'ruangguru', table = 'rg_floating_icon') {
this.container = document.getElementById('bantuan-divs-container');
this.floatingElements = [];
this.product = product;
this.table = table;
// Configuration
this.config = {
baseApiUrl: 'https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/rg_banner/views/',
apiKey: 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
maxElements: 2,
zIndexBase: 100,
};
// Build dynamic API URL based on table parameter
this.config.apiUrl = this.buildApiUrl();
this.init();
}
buildApiUrl() {
const baseUrl = this.config.baseApiUrl;
const tableName = this.table || 'rg_floating_icon';
const queryParams =
'offset=0&limit=99999&sort=rankPosition&where=(type,eq,floating)~and(showIn,anyof,blog)~and(hide,is,false)~and(product,eq,' +
this.product +
')&nested%5Bcta%5D%5Bfields%5D=Id,name,ctaId,imageUrl,ctaLink,targetUrl';
return `${baseUrl}${tableName}?${queryParams}`;
}
async init() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to initialize floating divs component:', error);
}
}
async fetchFloatingElements() {
try {
const options = {
method: 'GET',
headers: {
'xc-token': this.config.apiKey || 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
},
};
const urlNoco = this.config.apiUrl;
const response = await fetch(urlNoco, options);
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
const data = await response.json();
this.floatingElements = this.processApiResponse(data);
} catch (error) {
console.error('Error fetching floating elements:', error);
throw error;
}
}
processApiResponse(data) {
if (!data || !data.list || !Array.isArray(data.list)) {
return [];
}
console.log(data.list);
// Ensure we only get maximum 2 elements
const limitedElements = data.list.slice(0, this.config.maxElements);
return limitedElements;
}
renderFloatingElements() {
if (!this.container || this.floatingElements.length === 0) {
return;
}
// Additional safeguard: ensure we never render more than maxElements
const elementsToRender = this.floatingElements.slice(0, this.config.maxElements);
// Clean up existing elements and their event listeners
this.cleanupExistingElements();
// Clear existing content
this.container.innerHTML = '';
elementsToRender.forEach((element, index) => {
const floatingDiv = this.createFloatingDiv(element, index);
this.container.appendChild(floatingDiv);
});
}
cleanupExistingElements() {
// Clear existing elements (no need for event listener cleanup with CSS approach)
const existingElements = this.container.querySelectorAll('[data-floating-element]');
existingElements.forEach(element => {
element.remove();
});
}
createFloatingDiv(element, index) {
const div = document.createElement('div');
const cta = element.cta[0]; // Use the first CTA
// Add data attribute for cleanup tracking
div.setAttribute('data-floating-element', 'true');
// Apply CSS classes based on rankPosition
const positionClass = this.getPositionClass(element.rankPosition, index);
div.className = `bantuan-element ${positionClass}`;
div.style.zIndex = this.config.zIndexBase + index;
// Create the link and image
const link = document.createElement('a');
link.href = 'https://cta.ruangguru.com/' + cta.ctaId || '#';
link.target = '_blank';
// Add tracking attributes
link.setAttribute('data-tracking-event-type', 'landing_page__core__item_click');
link.setAttribute(
'data-tracking-context',
JSON.stringify({
product_name: this.product,
cta_action: 'redirection',
cta_action_detail: link.href,
item_type: 'floating',
item_name: element.name || 'Floating element',
item_category: 'payment',
item_position: index,
item_serial: null,
section_type: 'floating_item',
section_position: 'body',
section_name: 'floating_item',
})
);
const img = document.createElement('img');
img.src = element.imageUrl + '?h=200&convert=webp';
img.alt = element.name || 'Floating element';
img.loading = 'lazy';
// Add click tracking
link.addEventListener('click', () => {
this.trackClick(element, cta);
});
link.appendChild(img);
div.appendChild(link);
return div;
}
getPositionClass(rankPosition, index) {
// Define positioning classes based on rankPosition
if (rankPosition === 1) {
return 'bantuan-top'; // Top position
} else if (rankPosition === 2) {
return 'bantuan-bottom'; // Bottom position
} else {
// For additional elements, distribute them evenly
return `bantuan-${index % 2 === 0 ? 'top' : 'bottom'}-${Math.floor(index / 2) + 1}`;
}
}
trackClick(element, cta) {
// Implement click tracking logic here
console.log('Floating element clicked:', {
elementId: element.Id,
elementName: cta.name,
ctaId: cta.ctaId,
targetUrl: cta.targetUrl,
});
}
// Public method to manually refresh
async refresh() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to refresh floating elements:', error);
throw error;
}
}
// Public method to get current floating elements
getFloatingElements() {
return [...this.floatingElements];
}
}
// Initialize the component when DOM is ready
document.addEventListener('DOMContentLoaded', () => {
// Get product and table parameters from data attributes
const container = document.getElementById('bantuan-divs-container');
const product = container.getAttribute('data-product') || 'ruangguru';
const table = container.getAttribute('data-table') || 'rg_floating_icon';
new FloatingDivsComponent(product, table);
});
// Export for use in other modules if needed
if (typeof module !== 'undefined' && module.exports) {
module.exports = FloatingDivsComponent;
}
</script> <div id="wp-install-nudge" style="
position: fixed;
bottom: 0rem;
right: 0;
z-index: 999;
cursor: pointer;
"></div>
<script>
(function (w, d, s, o, f, js, fjs) {
w['Sales-Nudge-Widget'] = o; w[o] = w[o] || function () { (w[o].q = w[o].q || []).push(arguments) };
js = d.createElement(s), fjs = d.getElementsByTagName(s)[0];
js.id = o; js.src = f; js.async = 1; fjs.parentNode.insertBefore(js, fjs);
}(window, document, 'script', 'wpInstallNudge', 'https://cdn-web-2.ruangguru.com/sales-nudge/6198a95130/dist/widget.js'));
wpInstallNudge('init', { targetElementId: 'wp-install-nudge', clientTarget: 'ruangguru_blog' });
</script>
<script>
// note: disabled due to auto reload page
// var lastScrollTop = 0;
// $(window).scroll(function(event){
// var st = $(this).scrollTop();
// if (st > lastScrollTop){
// $('#wp-install-nudge').slideDown( "slow", function() {});
// } else {
// $('#wp-install-nudge').slideUp( "slow", function() {});
// }
// lastScrollTop = st;
// });
// $(document).ready(function () {
// $("#wp-install-nudge").hide();
// });
$('#wp-install-nudge').click(function(){
Analytics.track("promotion__install_nudge__click",
{
user_email: "ruangguru@blog.com",
cta_link: widgetData.dataConfig.target_link
}).catch((err) => {
console.log("tracker error", err);
});
});
</script>
</footer>
<div id="__next"></div>
<script type="speculationrules">
{"prefetch":[{"source":"document","where":{"and":[{"href_matches":"\/blog\/*"},{"not":{"href_matches":["\/blog\/wp-*.php","\/blog\/wp-admin\/*","\/blog\/wp-content\/uploads\/*","\/blog\/wp-content\/*","\/blog\/wp-content\/plugins\/*","\/blog\/wp-content\/themes\/ruangguru\/*","\/blog\/*\\?(.+)"]}},{"not":{"selector_matches":"a[rel~=\"nofollow\"]"}},{"not":{"selector_matches":".no-prefetch, .no-prefetch a"}}]},"eagerness":"conservative"}]}
</script>
<script>
async function getCtaDetails(ctaIds) {
const endpoint =
" https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/CTA/views/CTA?offset=0&limit=10&where=(ctaId,in," + ctaIds.toString() + ")";
try {
const response = await fetch(endpoint, {
headers: {
"xc-token": "-hG2nBDJzSj0agSgNtcJx97M4F02y54nUMoY6plJ",
},
});
const data = await response.json();
const ctaList = data?.list || [];
const ctaMap = new Map();
for (const ctaData of ctaList) {
ctaMap.set(ctaData.ctaId, ctaData);
}
return ctaMap;
} catch (error) {
console.error("Error fetching CTA details:", error);
return new Map();
}
}
async function replaceCTA() {
const regex = /{{cta\((‘(.*?)’|“(.*?)”)\)}}/g;
const bodyHTML = document.body.innerHTML;
const matches = Array.from(bodyHTML.matchAll(regex));
const ctaIds = matches.map((match) => {
let ctaId = match[2] ?? match[3];
return ctaId;
});
const ctaMap = await getCtaDetails(ctaIds);
const replacedHTML = bodyHTML.replace(regex, (match, _inner, ctaId1, ctaId2) => {
const ctaId = ctaId1 ?? ctaId2;
const ctaData = ctaMap.get(ctaId);
if (ctaData) {
return `<a href="https://cta.ruangguru.com/${ctaData.ctaId}" target="_${ctaData.targetType}" style="position:relative;display:inline-block;">
<img src="${ctaData.imageUrl}" loading="lazy" alt="${ctaData.altText}" />
</a>`;
} else {
return match;
}
});
document.body.innerHTML = replacedHTML;
}
</script>
<meta name="author" content="Ruangguru Tech Team">
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PVNLZFT" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- Tracker -->
<script type="text/javascript" src="https://cdn-web-2.ruangguru.com/landing-page-web/public/staticpages/global-assets/js/cta.js"></script>
<script src="https://unpkg.com/@dotlottie/player-component@latest/dist/dotlottie-player.mjs" type="module"></script>
</body>
</html>