10.15.09_DiscHmwk - Prophase 2s Metaphase 2s Anaphase 2s...

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Intro Bio 151/153 Discussion Homework; week of 10/19-10/23 Name: Josh Litwicki Discussion Section #: 609 1. Why do cells undergo mitosis? Cells undergo mitosis to replicate the DNA inside the nucleus under controlled phases and environment. 2. Summarize what occurs in each phase of the cell cycle. a. G 1 Biosynthetic activities of the cell resume at a high rate. Also, enzymes are produced that are needed for the S phase. b. G 2 Protein synthesis, mainly microtubules. c. M – Division of nucleus and cytoplasm d. S – Chromosomes replicate 3. If the amount of DNA in a somatic cell during G 1 of interphase is S, then how much DNA is present in the cell during each phase of mitosis? Mitosis: Interphase – S in G1; 2S in G2
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Unformatted text preview: Prophase 2s Metaphase 2s Anaphase 2s Telophase 2s Cytokinesis 2s 4. How many cells are produced at the end of a single mitotic division? Cells replicate at a linear rate. 1 cell goes to 2. 2 goes to 4. 4 goes to 8. 8 goes to 16 and so on. 5. How many different kinds of cells are produced at the end of a single mitotic division? 1 The cell is replicated into 2 sister cells which are exactly the same. So there is only 1 type of cell produced. 6. DNA is a very stable molecule. What characteristics of its structure make it stable? Deoxyribose is less reactive than ribose. And, the C-H bonds of DNA are more stable than the C-OH bonds of RNA. 2...
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This note was uploaded on 02/14/2011 for the course ORGANIC CH 341 taught by Professor Idk during the Spring '11 term at Wisconsin.

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10.15.09_DiscHmwk - Prophase 2s Metaphase 2s Anaphase 2s...

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