Pset7questions2013

A ribulose bisphosphate is normally synthesized from

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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 Pick ONE: A. C4 plants show, in full sunlight, considerably faster photosynthesis than C3 plants B. C4 plants show, in low light intensity, considerably lower photosynthetic efficiency than C3 plants C. Per C atom fixed, C4 plants require more ATP than C3 plants D. C4 plants require ATP to convert pyruvate to PEP E. Some C4 plants have higher dark respiration than C3 plants F. All of the above are true
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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 ? A. C4 and CAM plants capture CO 2 as C4 acids, using PEP carboxylase. B. CAM plants capture CO 2 as C4 acids, during the day, and C4 plants do it at night. C. CAM plants separate CO 2 capture spatially, C4 plants do it temporally D. All the above are correct E. All the above are incorrect 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 A. only i is correct B. only ii is correct C. only iii is correct F. all are correct Reset Selection Mark for Review What's This? Question 8 of 16 4.0 Points Continuing with the previous question, which of the following is true? Pick ONE: A. CAM plants convert the ordinary daily closing/noctural opening stomatal cycle into a reversed cycle of nocturnal closing and diurnal opening B. CO 2 consumption by PEP carboxylase at night will lower the [CO 2 ] inside the leaf (or stem, e.g. in leafless cacti); guard cells will respond to this low [CO 2 ] by closing the stomates.
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A Ribulose bisphosphate is normally synthesized from...

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