Plant Physiology UPSC Questions

Biology

Plant Physiology MCQ Questions


1.
Who discovered the role of sunlight in purifying air through plant activity?
A.
Joseph Priestley
B.
Jan Ingenhousz
C.
T.W. Engelmann
D.
Melvin Calvin
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ANSWER :
B. Jan Ingenhousz
2.
Which pigment is considered the chief pigment associated with photosynthesis?
A.
Chlorophyll b
B.
Xanthophyll
C.
Carotenoid
D.
Chlorophyll a
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ANSWER :
D. Chlorophyll a
3.
In which part of the chloroplast are ATP and NADPH formed during the light reaction?
A.
Stroma
B.
Grana
C.
Thylakoid membrane
D.
Stroma lamella
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ANSWER :
C. Thylakoid membrane
4.
What is the first stable product formed during Calvin Cycle?
A.
OAA
B.
PEP
C.
PGA
D.
RuBP
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ANSWER :
C. PGA
5.
Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss?
1. Hard and waxy leaves
2. Tiny leaves or no leaves
3. Thorns instead of leaves
Select the correct answer using the codes given below.
UPSC - 2013
A.
1 and 2 only
B.
2 only
C.
1 and 3 only
D.
1, 2 and 3
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ANSWER :
D. 1, 2 and 3
6.
Which process is explained by the Z scheme?
A.
Cyclic photophosphorylation
B.
Electron transport
C.
Photorespiration
D.
Chemiosmosis
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ANSWER :
B. Electron transport