LBL1_2010 - mRNA binds to the small subunit. After mRNA...

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Learn Before Lecture (LBL) 1 Worksheet:  Nucleus and Ribosomes (~20 min) Type your answers in the boxes provided. Upload your assignment as a word or pdf to your EEE Dropbox before 9 am on Mon, Oct. 4 th . Take the Lecture 4 online quiz (this material will be on the quiz!). Bring a copy of assignment with you to class. The nucleus is a membrane bound structure that contains the genetic library in all eukaryotic cells. Read pages 102-103, examine Figure 6.10 and answer the following questions. 1. What is chromatin? 2. What specific process takes place in the nucleolus, a specialized region within the nucleus? 3. What structure allows proteins and other large macromolecules to move into and out of the nucleus? Ribosomes are the organelles involved in the synthesis of all proteins. Ribosomes are made of two subunits, one large and one small (see fig. 6.11). These are found separately in the cytoplasm and they only combine when
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Unformatted text preview: mRNA binds to the small subunit. After mRNA binds, the large subunit binds and protein synthesis begins. Read the short section on ribosomes, pg 102-103, to find out where ribosomes go to finish protein synthesis, and answer the following questions. 4. Synthesis of all proteins begins first on free ribosomes (True or False). 5. If synthesis of a protein is completed by a free ribosome, where in the cell will the protein function? 6. If a protein is going to be secreted where will protein synthesis be completed? 7. To understand how secreted proteins are synthesized look carefully at Figure 17.21 in your text. In your own words , write 6 statements that describe each step shown in the process of a ribosome that is making a secreted protein. 1. 2. 3. 4. 5. 6....
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This note was uploaded on 10/03/2010 for the course BIO 05200 taught by Professor Dowd during the Spring '10 term at UC Irvine.

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