What would you expect to happen if the anaphase-promoting complex/cyclosome (APC/C) failed to ubiquitinate securin?
A. The cohesin complex will persist, preventing the cell from entering anaphase.
B. Securin will remain intact and therefore will degrade cohesin, allowing the cell to enter anaphase.
C. The cohesin complex will be destroyed, and the cell will remain in metaphase.
D. Separase will be marked for degradation by securin, preventing the cell from entering anaphase.
Answer: A
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Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What will be an ideal response?
Acridine dyes are mutagens that
A) disrupt the reading frame of the gene. B) replace an AT base pair with a GC base pair. C) reverse the polarity of the double helix. D) kill cells.
The meiosis that produces the microspores is
indicated by a. A. b. B. c. C. d. D. e. E.
What type of reactions take place in the portion of the sulfur cycle indicated in the figure above?
A. oxidation-reduction B. fermentation C. dissimilation D. denitrification E. carbon fixation