Plant Physiology UPSC Questions

Biology

Plant Physiology MCQ Questions


7.
Where does the Calvin Cycle take place in C4 plants?
A.
Mesophyll cells
B.
Bundle sheath cells
C.
Stomata
D.
Chloroplasts of mesophyll
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ANSWER :
B. Bundle sheath cells
8.
Lichens, which are capable of initiating ecological succession even on a bare rock, are actually a symbiotic association of

UPSC - 2014

A.
Algae and bacteria
B.
Algae and fungi
C.
Bacteria and fungi
D.
Fungi and mosses
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ANSWER :
B. Algae and fungi
9.
What is the function of accessory pigments in photosynthesis?
A.
Split water
B.
Store energy
C.
Absorb additional wavelengths
D.
Release oxygen
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ANSWER :
C. Absorb additional wavelengths
10.

What does PEPCase enzyme catalyze in C4 plants?

A.

Conversion of RuBP to PGA

B.

Fixation of CO2 to PEP

C.

Reduction of NADP+

D.

Synthesis of glucose

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ANSWER :

B. Fixation of CO2 to PEP

11.

What is the source of the oxygen released during photosynthesis?

A.

CO2

B.

Carbohydrates

C.

H2O

D.

OAA

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ANSWER :

C. H2O

12.
What is the optimum temperature range for C3 plants?
A.
20-25°C
B.
30-40°C
C.
Above 40°C
D.
Below 15°C
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ANSWER :
A. 20-25°C