Botany and Zoology AFCAT Questions

AFCAT Biology

Botany and Zoology MCQ Questions


13.
Which process produces ONLY ATP (no NADPH) during light reactions?
A.
Chemiosmosis-independent ATP synthesis
B.
Non-cyclic photophosphorylation
C.
Cyclic photophosphorylation
D.
Photolysis of water
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ANSWER :
C. Cyclic photophosphorylation
14.
The site of ATP synthesis in chloroplasts during photophosphorylation is:
A.
Outer chloroplast membrane
B.
Inter-membrane space
C.
Stromal matrix
D.
CF1 part of ATP synthase on thylakoid membrane
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ANSWER :
D. CF1 part of ATP synthase on thylakoid membrane
15.
According to the chemiosmotic hypothesis, ATP synthesis is driven by:
A.
Proton gradient across the thylakoid membrane
B.
Direct light energy on ATPase
C.
Electron flow through cytochromes alone
D.
Oxidation of glucose
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ANSWER :
A. Proton gradient across the thylakoid membrane
16.
The primary CO2 acceptor in the Calvin (C3) cycle is:
A.
Oxaloacetic acid (OAA)
B.
Ribulose-1,5-bisphosphate (RuBP)
C.
3-Phosphoglyceric acid (PGA)
D.
Phosphoenolpyruvate (PEP)
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ANSWER :
B. Ribulose-1,5-bisphosphate (RuBP)
17.
The first stable product of CO2 fixation in C3 plants is:
A.
Oxaloacetic acid (OAA)
B.
Glyceraldehyde-3-phosphate
C.
Phosphoenolpyruvate (PEP)
D.
3-Phosphoglyceric acid (PGA)
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ANSWER :
D. 3-Phosphoglyceric acid (PGA)
18.
The first stable product of CO2 fixation in C4 plants is:
A.
3-PGA
B.
Pyruvic acid
C.
Oxaloacetic acid (OAA)
D.
Malic acid
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ANSWER :
C. Oxaloacetic acid (OAA)