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Pset7questions2013

A suspension of algae is incubated in a flask in the

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Question 4 of 16 4.0 Points A suspension of algae is incubated in a flask in the presence of both light and CO 2 . When it is transferred to the dark, the reduction of 3-phosphoglycerate to glyceraldehyde 3-phosphate is blocked, and the concentration of ribulose bisphosphate (RuBP) declines. Why does the RuBP concentration decline? A. Ribulose bisphosphate is normally synthesized from glyceraldehyde 3-phosphate. B. Glyceraldehyde 3-phosphate is normally converted to glucose. C. Ribulose bisphosphate is normally used to synthesize 3-phosphoglycerate. D. Both a and b E. Both a and c Reset Selection Mark for Review What's This? Question 5 of 16 4.0 Points Which of the following facts about C4 & C3 plants is true? Pick ONE:
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5/20/13 4:18 PM 2013 Problem Set 7 Plant Biology Lectures 3-7 Page 5 of 13 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment Reset Selection Mark for Review What's This? Question 6 of 16 4.0 Points Which ONE of the following is true of the way C4 and CAM plants capture CO 2 ? Reset Selection Mark for Review What's This? Question 7 of 16 4.0 Points In CAM plants a daily cycle of carboxylase and decarboxylase activities is found, with PEP carboxylase being high in activity at night, while a malate-decarboxylating enzyme (and also RuBP carboxylase) is high during the day. Which of the following possibilities are true? i. there is a daily cycle of C4 acid accumulation and disappearance in this type of leaf. ii. PEP carboxylase activity at night will fix CO 2 , causing malate to accumulate iii.malate decarboxylase during the day will split malate, releasing CO 2 and draining down the previouly accumulated malate Reset Selection Mark for Review What's This?
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