Ch. 10 Quiz

Question 1

What is the function of stomata?

Answer 1

Gas exchange

Question 2

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?

Answer 2

ATP and NADPH

Question 3

Which of the following equations best summarizes photosynthesis?

Answer 3

6CO2 + 6H2O –> C6H12O6 +6CO2

Question 4

Photosynthesis is not responsible for…

Answer 4

fossil fuels

Question 5

The last stage of one complete turn of the Calvin cycle involves

Answer 5

Regeneration of RuBP

Question 6

Which statement describes the functioning of photosystem II?

a) light energy excites electrons in the thylakoid membrane electron transport chain
b) photons are passed along to a reaction-center chlorophyll
c) the P680 chlorophyll donates a pair of protons to NADP+, which is thus converted to NADPH
d) the electron vacancies in P680+ are filled by electrons derived from water
d) the splitting of water yields molecular carbon dioxide as a by-product

Answer 6

d) The electron vacancies in P680+ are filled by electrons derived from water

Question 7

Which of the following statements best describes the relationship between photosynthesis and respiration?

Answer 7

Photosynthesis stores energy in complex organic molecules, whereas respiration releases it

Question 8

How many molecules of glucose are produced by each cycle of the light reaction?

Answer 8

Zero

Question 9

Where do the enzymatic reactions of the Calvin cycle take place?

Answer 9

stroma of the chloroplast

Question 10

CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they…

Answer 10

fix CO2 into organic acids during the night