Photosynthesis Part 2 Concept Review

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Figure 8.16 In the photosystem II (PSII) reaction center, energy from sunlight is used to extract electrons from

water. The electrons travel through the chloroplast electron transport chain to photosystem I (PSI), which reduces

NADP+ to NADPH. The electron transport chain moves protons across the thylakoid membrane into the lumen. At

the same time, splitting of water adds protons to the lumen, and reduction of NADPH removes protons from the

stroma. The net result is a low pH in the thylakoid lumen, and a high pH in the stroma. ATP synthase uses this

electrochemical gradient to make ATP.

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What is the initial source of electrons for the chloroplast electron transport chain?

a. water

b. oxygen

c. carbon dioxide

d. NADPH

Figure 8.18 The Calvin cycle has three stages. In stage 1, the enzyme RuBisCO incorporates carbon dioxide into

an organic molecule, 3-PGA. In stage 2, the organic molecule is reduced using electrons supplied by NADPH. In

stage 3, RuBP, the molecule that starts the cycle, is regenerated so that the cycle can continue. Only one carbon

dioxide molecule is incorporated at a time, so the cycle must be completed three times to produce a single threecarbon

GA3P molecule, and six times to produce a six-carbon glucose molecule.

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Which of the following statements is true?

a. In photosynthesis, oxygen, carbon dioxide, ATP, and NADPH are reactants. GA3P and water are

products.

b. In photosynthesis, chlorophyll, water, and carbon dioxide are reactants. GA3P and oxygen are

products.

c. In photosynthesis, water, carbon dioxide, ATP, and NADPH are reactants. RuBP and oxygen are

products.

d. In photosynthesis, water and carbon dioxide are reactants. GA3P and oxygen are products.

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Which of the following components is not used by both
plants and cyanobacteria to carry out photosynthesis?

a. chloroplasts

b. chlorophyll

c. carbon dioxide

d. water

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What two main products result from photosynthesis?

a. oxygen and carbon dioxide

b. chlorophyll and oxygen

c. sugars/carbohydrates and oxygen

d. sugars/carbohydrates and carbon dioxide

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In which compartment of the plant cell do the lightindependent
reactions of photosynthesis take place?

a. thylakoid

b. stroma

c. outer membrane

d. mesophyll

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Which of the following structures is not a component of
a photosystem?

a. ATP synthase

b. antenna molecule

c. reaction center

d. primary electron acceptor

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Which complex is not involved in the establishment of
conditions for ATP synthesis?

a. photosystem I

b. ATP synthase

c. photosystem II

d. cytochrome complex

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From which component of the light-dependent
reactions does NADPH form most directly?

a. photosystem II

b. photosystem I

c. cytochrome complex

d. ATP synthase

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Which statement correctly describes carbon fixation?

a. the conversion of CO2 into an organic

compound

b. the use of RuBisCO to form 3-PGA

c. the production of carbohydrate molecules from

G3P

d. the formation of RuBP from G3P molecules

e. the use of ATP and NADPH to reduce CO2

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Photosynthesis Part 2 Concept Review

What is the initial source of electrons for the chloroplast electron transport chain?

Which of the following statements is true?

Which of the following components is not used by bothplants and cyanobacteria to carry out photosynthesis?

What two main products result from photosynthesis?

In which compartment of the plant cell do the lightindependentreactions of photosynthesis take place?

Which of the following structures is not a component ofa photosystem?

Which complex is not involved in the establishment ofconditions for ATP synthesis?

From which component of the light-dependentreactions does NADPH form most directly?

Which statement correctly describes carbon fixation?

What is the initial source of electrons for the chloroplast electron transport chain?

Which of the following statements is true?

Which of the following components is not used by bothplants and cyanobacteria to carry out photosynthesis?

What two main products result from photosynthesis?

In which compartment of the plant cell do the lightindependentreactions of photosynthesis take place?

Which of the following structures is not a component ofa photosystem?

Which complex is not involved in the establishment ofconditions for ATP synthesis?

From which component of the light-dependentreactions does NADPH form most directly?

Which statement correctly describes carbon fixation?

Which of the following components is not used by both
plants and cyanobacteria to carry out photosynthesis?

In which compartment of the plant cell do the lightindependent
reactions of photosynthesis take place?

Which of the following structures is not a component of
a photosystem?

Which complex is not involved in the establishment of
conditions for ATP synthesis?

From which component of the light-dependent
reactions does NADPH form most directly?

Which of the following components is not used by both
plants and cyanobacteria to carry out photosynthesis?

In which compartment of the plant cell do the lightindependent
reactions of photosynthesis take place?

Which of the following structures is not a component of
a photosystem?

Which complex is not involved in the establishment of
conditions for ATP synthesis?

From which component of the light-dependent
reactions does NADPH form most directly?