Exam 10: Photosynthesis

CAM plants function using crassulacean acid metabolism.Like C₄ plants,CAM plants provide a preparatory step for the Calvin cycle.CAM plants are found in hot,dry environments;to prevent dessication,they keep their stomata closed during the day.They take in carbon dioxide at night while stomata are open.To increase the concentration of carbon dioxide available to the enzyme rubisco and minimize the degree of photorespiration,the CAM plants carboxylate

Which of the following is FALSE regarding photosynthesis?

In the light dependent reactions of photosynthesis,the plant cell will conduct both linear and cyclic electron transport.This is needed because

What is the difference between NAD⁺ and NADP?

Both C₃ and C₄ plants have the enzymes of the Calvin cycle.How are C₄ plants more efficient than C₃ plants at fixing carbon?

Purple photosynthetic bacteria do not contain chloroplasts.They have an antenna system that includes two light-harvesting protein complexes,both of which are integral membrane proteins.The bacteriochlorophyll a molecules contain Mg²⁺ and absorb light at 800 nm.Which of the following statements comparing photosynthesis in purple bacteria and plant chloroplasts is true?

Melvin Calvin introduced radiolabeled carbon dioxide into plants.Which of the following molecules should he have expected to see radiolabeled first?

Which of the following procedures would identify the enzyme that catalyzes the carboxylation of ribulose-1,5-bisphosphate?

In photosynthesis,what is the role of water (H₂O)?

The final electron acceptor(s)associated with photosystem I is

As electrons are passed through the system of electron carriers associated with photosystem II,they lose energy.What happens to this energy?

Besides proteins,thylakoid membranes must contain a large number of ________ molecules in the reaction centers in order to harvest light energy.

Which of the following statements about photosynthesis and cellular respiration is TRUE?

What is a difference between chlorophyll a and chlorophyll b?

Sagebrush is a C4 plant,while wheat is a C3 plant.Based on the type of photosynthesis that would occur in these plants in an arid (dry)southern region of the United States,which of the following is true?

How does carbon fixation differ between C₃ and C₄ plants?

How are the light-dependent and light-independent reactions of photosynthesis related?

The electrons of photosystem II are excited and transferred to electron carriers.From which molecule or structure do the photosystem II replacement electrons come?

Early investigators thought the oxygen produced by photosynthetic plants came from carbon dioxide.In fact,it comes from