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Biologi SMA

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Modul Biologi Kelas XI KD 3.2 KEGIATAN PEMBELAJARAN 2 SINTESIS PROTEIN A. Tujuan Pembelajaran Setelah kegiatan pembelajaran 2 ini diharapkan peserta didik diharapkan mampu: 1. Memahami mekanisme transkripsi pada sintesis protein. 2. Memahami mekanisme tranlasi pada sintesis protein. 3. Memahami keterkaitan proses transkripsi dan translasi pada sintesis protein. B. Uraian Materi 1. Sintesis Protein Pertumbuhan berbagai karakter makhluk hidup adalah melalui reaksi kimia yang kompleks yang dilancarkan oleh enzim. Enzim tersusun oleh protein, sehingga sintesis protein sangat menentukan karakter makhluk hidup. Untuk sintesis protein diperlukan: 1. Tempat 2. Bahan 3. Perencana : DNA : ribosom. : asam amino 4. Pelaksana :3 macam RNA, enzim RNA polymerase, dan sumber energi ATP Pada prinsipnya proses sintesis protein melalui dua tahap yaitu transkripsi dan translasi. a. Transkripsi Transkripsi merupakan pembentukan RNA duta oleh DNA template atau rantai anti sense di inti sel. Langkah ini diawali dengan pemisahan rantai sense dengan rantai anti sense oleh enzim RNA polimerase, selanjutnya enzim ini merangkaikan nukleotida RNA. RNA d dibentuk dengan ketentuan: "gula yang dicetak adalah ribosa • basa yang dicetak meliputi Adenin, Guanin, Sitosin dan Urasil. Traskripsi terdiri dari 3 tahapan yaitu inisiasi, elongasi, terminasi. DNA template MRNA RNA polymerase Gambar 5. Pemisahan rantai ganda DNA dan pembentukan RNA duta www.docplayer.info b. Translasi Translasi adalah penerjemahan kode-kode asam amino yang ada di RNA d oleh RNA t dan penyusunan asam amino menjadi polipeptida. Setelah RNA duta keluar inti sel, melalui sitoplasma masuk ke ribosom. Di ribosom RNA d menempel pada RNA ribosom. @2020, Direktorat SMA, Direktorat Jenderal PAUD, DIKDAS dan DIKMEN 17

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H* 4G 12:26 2? H* 58% If the caller requests details about you or others, consider before responding. * unwisely immediately O Option 6 O rudely carefully immediately What is the purpose of the text? * This text is for no 4 to Ladies and Gentlemen, in case of emergency, tak the life jacket which is located under your seat. Put the life jacket over your head and then fasten the jacket tapes around you're your waist. Do not inflate the jacket umtil you left the aircraft. The jacket will he automatically inf by pulling a cord, but if not, you can blow into the chip to inflate it. A light is attached to the jacket for attracting attention. The life jacket should be removel only in case of emergeney. The use of TV set, AM and FM radios and radio cassettes recorders, walkman, and any mobile phones are prohibited on hoard as they interfere the commanication and navigational system. We wish you am enjoyable flight. lated To inform the readers about the function of a life jacket. To explain the process of life evacuation during the disaster. To describe the way how to save lives using a life jacket. To tell the readers about the safe flight instruction. To inform the readers to take precaution steps. Option 1 What is the best arrangement for the following procedure text? * 8. What is the best arrangement for the following procedure text? 1. Read over the service agreement and click the box saying that you agree to abide by the email system's rules. Once completed, click on the Submit or Enter button at the bottom of the screen. 2. Find where to sign up. Usually, there is a small link image or text that says "register" or "sign up," although you may have to go to the login page to find this. 3. Visit a website that offers an email service. Usually are yahoo.com google.com. and hotmail.com. 4. Follow all the instructions on the page, filling out all the needed details. 5. Email has been created. Continue on to import your contacts, message with friends, or write emails, plus much more. O 3-1-4-2-5 O 3-1-2-4-5 O 3-4-2-1-5 EO 3-2-4-1-5

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