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Bio 220 (Rader) Midterm Exam |Actual Questions
with Correct Answers (100% Verified) | Latest
Update 2025 |Graded A+
d - CORRECT✓✓ Where do the enzymatic reactions of the Calvin cycle take place?
a thylakoid space
b thylakoid membranes
c matrix of the mitochondria
d stroma of the chloroplast
e cytosol around the chloroplast
a - CORRECT✓✓ What is the primary function of the Calvin cycle?
a synthesize simple sugars from carbon dioxide
b split water and release oxygen
c transport RuBP out of the chloroplast
d use NADPH to release carbon dioxide
e use ATP to release carbon dioxide
b - CORRECT✓✓ Reactions that require CO2 take place in _____.
a neither the light reactions nor the Calvin cycle
b the Calvin cycle alone
c the chloroplast, but not as part of photosynthesis
d the light reactions alone
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e both the light reactions and the Calvin cycle
c - CORRECT✓✓ Which of the following statements best represents the relationships
between the light reactions and the Calvin cycle?
a The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin
cycle provides the light reactions with water to split.
b The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin
cycle supplies the light reactions with sugars to produce ATP.
c The light reactions provide ATP and NADPH to the Calvin cycle, and the Calvin cycle
returns ADP, Pi, and NADP+ to the light reactions.
d The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin
cycle, and the cycle provides water and electrons to the light reactions.
e There is no relationship between the light reactions and the Calvin cycle.
a - CORRECT✓✓ How are the light-dependent and light-independent reactions of
photosynthesis related?
a The products of light-dependent reactions are used in light-independent reactions.
b The products of light-independent reactions must be present for light-dependent reactions to
take place.
c They are not related.
d The products of light-independent reactions are used in light-dependent reactions.
b - CORRECT✓✓ As electrons are passed through the system of electron carriers associated
with photosystem II, they lose energy. What happens to this energy?
a It is used to phosphorylate NAD+ to NADPH, the molecule that accepts electrons from
photosystem I.
b It is used to establish and maintain a proton gradient.
c It excites electrons of the reaction center of photosystem I.
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a - CORRECT✓✓ What is the main purpose of light-dependent reactions of photosynthesis?
a to produce NADPH and ATP
b to use ATP to make glucose
c to produce NADPH for use in respiration
d to generate oxygen by "splitting" H2O
d - CORRECT✓✓ Which of the events listed below occurs in the light reactions of
photosynthesis?
a NADP is produced.
b Carbon dioxide is incorporated into PGA.
c ATP is phosphorylated to yield ADP.
d Light is absorbed and funneled to reaction-center chlorophyll a.
e NADPH is reduced to NADP+.
d - CORRECT✓✓ Which of the following are directly associated with photosystem I?
a extraction of hydrogen electrons from the splitting of water
b generation of molecular oxygen
c passing electrons to the cytochrome complex
d receiving electrons from the thylakoid membrane electron transport chain
e harvesting of light energy by ATP
b - CORRECT✓✓ In mitochondria, chemiosmosis moves protons from the matrix into the
intermembrane space, whereas in chloroplasts, chemiosmosis moves protons from the _____.
a intermembrane space to the matrix
b stroma to the thylakoid space
c stroma to photosystem II
d matrix to the stroma
Bio 220 (Rader) Midterm Exam |Actual Questions
with Correct Answers (100% Verified) | Latest
Update 2025 |Graded A+
d - CORRECT✓✓ Where do the enzymatic reactions of the Calvin cycle take place?
a thylakoid space
b thylakoid membranes
c matrix of the mitochondria
d stroma of the chloroplast
e cytosol around the chloroplast
a - CORRECT✓✓ What is the primary function of the Calvin cycle?
a synthesize simple sugars from carbon dioxide
b split water and release oxygen
c transport RuBP out of the chloroplast
d use NADPH to release carbon dioxide
e use ATP to release carbon dioxide
b - CORRECT✓✓ Reactions that require CO2 take place in _____.
a neither the light reactions nor the Calvin cycle
b the Calvin cycle alone
c the chloroplast, but not as part of photosynthesis
d the light reactions alone
,2|Page
e both the light reactions and the Calvin cycle
c - CORRECT✓✓ Which of the following statements best represents the relationships
between the light reactions and the Calvin cycle?
a The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin
cycle provides the light reactions with water to split.
b The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin
cycle supplies the light reactions with sugars to produce ATP.
c The light reactions provide ATP and NADPH to the Calvin cycle, and the Calvin cycle
returns ADP, Pi, and NADP+ to the light reactions.
d The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin
cycle, and the cycle provides water and electrons to the light reactions.
e There is no relationship between the light reactions and the Calvin cycle.
a - CORRECT✓✓ How are the light-dependent and light-independent reactions of
photosynthesis related?
a The products of light-dependent reactions are used in light-independent reactions.
b The products of light-independent reactions must be present for light-dependent reactions to
take place.
c They are not related.
d The products of light-independent reactions are used in light-dependent reactions.
b - CORRECT✓✓ As electrons are passed through the system of electron carriers associated
with photosystem II, they lose energy. What happens to this energy?
a It is used to phosphorylate NAD+ to NADPH, the molecule that accepts electrons from
photosystem I.
b It is used to establish and maintain a proton gradient.
c It excites electrons of the reaction center of photosystem I.
, 3|Page
a - CORRECT✓✓ What is the main purpose of light-dependent reactions of photosynthesis?
a to produce NADPH and ATP
b to use ATP to make glucose
c to produce NADPH for use in respiration
d to generate oxygen by "splitting" H2O
d - CORRECT✓✓ Which of the events listed below occurs in the light reactions of
photosynthesis?
a NADP is produced.
b Carbon dioxide is incorporated into PGA.
c ATP is phosphorylated to yield ADP.
d Light is absorbed and funneled to reaction-center chlorophyll a.
e NADPH is reduced to NADP+.
d - CORRECT✓✓ Which of the following are directly associated with photosystem I?
a extraction of hydrogen electrons from the splitting of water
b generation of molecular oxygen
c passing electrons to the cytochrome complex
d receiving electrons from the thylakoid membrane electron transport chain
e harvesting of light energy by ATP
b - CORRECT✓✓ In mitochondria, chemiosmosis moves protons from the matrix into the
intermembrane space, whereas in chloroplasts, chemiosmosis moves protons from the _____.
a intermembrane space to the matrix
b stroma to the thylakoid space
c stroma to photosystem II
d matrix to the stroma
