Q1Written answer
Which metal ion is a constituent of chlorophyll?
a. Iron
b. Copper
c. Magnesium
d. Zinc
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Worked solution
Option (c) is the answer.
NCERT Exemplar · Class 11 · Biology
Chapter 13: Photosynthesis in Higher Plants
Practice each question, then open the answer or worked solution.
MULTIPLE CHOICE QUESTIONS
14 questionsQ2Written answer
Which pigment acts directly to convert light energy to chemical energy?
a. Chlorophyll a
b. Chlorophyll b
c. Xanthophyll
d. Carotenoid
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Worked solution
Option (a) is the answer.
Q3Written answer
Which range of wavelength (in nm) is called photosynthetically active
radiation (PAR)?
a. 100 – 390
b. 390 – 430
c. 400 – 700
d. 760 – 100,00
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Worked solution
Option (c) is the answer.
Q4Written answer
Which light range is least effective in photosynthesis?
a. Blue
b. Green
c. Red
d. Violet
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Worked solution
Option (b) is the answer.
Q5Written answer
Chemosynthetic bacteria obtain energy from
a. Sun
b. Infrared rays
c. Organic substances
d. Inorganic chemicals
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Worked solution
Option (d) is the answer.
Q6Written answer
The energy required for ATP synthesis in PSII comes from
a. Proton gradient
b. Electron gradient
c. Reduction of glucose
d. Oxidation of glucose
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Worked solution
Option (a) is the answer.
Q7Written answer
During light reaction in photosynthesis, the following are formed:
a. ATP and sugar
b. Hydrogen, O2 and sugar
c. ATP, hydrogen and O2
d. ATP, hydrogen and O2 donor
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Worked solution
Option (c) is the answer.
Q8Written answer
The dark reaction in photosynthesis is called so because of
a. It can occur in dark also
b. It does not depend on light energy
c. It cannot occur during daylight
d. It occurs more rapidly at night
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Worked solution
Option (b) is the answer.
Q9Written answer
PEP is the primary CO2 acceptor in
a. C4 plants
b. C3 plants
c. C2 plants
d. Both C3 and C4 plants
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Worked solution
Option (a) is the answer.
Q10Written answer
Splitting of water is associated with
a. Photosystem I
b. The lumen of thylakoid
c. Both Photosystem I and II
d. The inner surface of the thylakoid membrane
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Worked solution
Option (d) is the answer.