Photosynthesis (Photosynthesis as a means of Autotrophic Nutrition; Site of Photosynthesis take place; Pigments involved in Photosynthesis (Elementary idea); Photochemical and Biosynthetic Phases of Photosynthesis; Cyclic and Non Cyclic and Photophosphorylation...) NEET Questions

Biology - Plant Physiology

Photosynthesis (Photosynthesis as a means of Autotrophic Nutrition; Site of Photosynthesis take place; Pigments involved in Photosynthesis (Elementary idea); Photochemical and Biosynthetic Phases of Photosynthesis; Cyclic and Non Cyclic and Photophosphorylation...) MCQ Questions


1.
Which of the following organisms are considered autotrophs due to their ability to perform photosynthesis?
A.
Fungi
B.
Algae
C.
Animals
D.
Protozoa
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ANSWER :
B. Algae
2.
In higher plants, photosynthesis primarily occurs in:
A.
Roots
B.
Stems
C.
Leaves
D.
Flowers
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ANSWER :
C. Leaves
3.
Which pigment is directly involved in the light reactions of photosynthesis?
A.
Chlorophyll a
B.
Chlorophyll b
C.
Carotenoids
D.
Xanthophylls
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ANSWER :
A. Chlorophyll a
4.
The light-dependent reactions (photochemical phase) of photosynthesis occur in the:
A.
Stroma
B.
Thylakoid membranes
C.
Cytoplasm
D.
Mitochondria
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ANSWER :
B. Thylakoid membranes
5.
Which of the following is a product of non-cyclic photophosphorylation but not of cyclic photophosphorylation?
A.
ATP
B.
NADPH
C.
Oxygen
D.
Both B and C
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ANSWER :
D. Both B and C
6.
The chemiosmotic hypothesis explains the mechanism of ATP synthesis in chloroplasts. Which ion's gradient is crucial for this process?
A.
Sodium
B.
Potassium
C.
Calcium
D.
Proton (H⁺)
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ANSWER :
D. Proton (H⁺)