MCB 150 Frequently Asked Questions

Questions in The Cell Cycle and Events of M-Phase

Page 10 out of 10 Pages

• I just want to make sure this is right: Kinesin and dyenin move sister chromatids until they line up at the metaphase plate. Then during anaphase A, sister chromatids move to opposite poles via kinetochore microtubules. During anaphase B, spindles distance themselves from each other, further separating sister chromatids. During the entirety of anaphase, kinesins and dyenins are not going to move. The microtubules now move.
  
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• Did we ever discuss/do we need to know what the functions of lamins a/b/c are?
  
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• When exactly do the chromosomes condense? At the end of G1 or in prophase?
  
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• In prometaphase, do the kinetochores connect to the chromosomes?
  
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• My question relates to the graph of amount of cells vs. amount of DNA discussed in lecture 34. What is the explanation for the amount of DNA being greater than 4n on some parts of the graph? What about when it is less than 2n?
  
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• 1. Does DNA replication only occur during Mitosis? 2. Does mRNA in Eukaryotes have Ribosome Binding site? Or does the 40S complex bind with 5'cap of mRNA,and it's done? 3. What are the differences between snRNA and snRNP, structurally and functionally?
  
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