MCQ Questions on Photosynthesis

Biology is the study of life. Below, You will find a list of Biology MCQ Questions as per the latest prescribed syllabus. Ace up your preparation with the Objective Questions available on Photosynthesis and enhance your subject knowledge. Understand the concept clearly by consistently practicing the Multiple Choice Questions and score well in your exams.

MCQ Questions on Photosynthesis

1. Photosynthesis occurs in
(a) Chloroplast
(b) Golgi body
(c) Endoplasmic reticulum
(d) Nucleus

Answer

Answer: (a) Chloroplast

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2. The optimum temperature for photosynthesis is
(a) 25-35℃
(b) 10-15℃
(c) 35-40℃
(d) 20-25℃

Answer

Answer: (d) 20-25℃

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3. Photorespiration occurs in
(a) Four cell organelles
(b) Two cell organelles
(c) One cell organelle
(d) Three cell organelle

Answer

Answer: (d) Three cell organelle

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4. Reduction of NADP occurs in
(a) Oxidative photophosphorylation
(b) Cyclic photophosphorylation
(c) Non-cyclic photophosphorylation
(d) None

Answer

Answer: (c) Non-cyclic photophosphorylation

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5. Kranz anatomy is found in the leaves of
(a) Wheat
(b) Mustard
(c) Potato
(d) Sugarcane

Answer

Answer: (d) Sugarcane

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6. Peroxisomes are involved in which type of reactions
(a) Calvin cycle
(b) Glyoxylate cycle
(c) Glycolate cycle
(d) Bacterial photosynthesis

Answer

Answer: (c) Glycolate cycle

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7. Photorespiration involves oxidation of
(a) PGA
(b) RuBP
(c) Chlorophyll a
(d) Both a and b

Answer

Answer: (b) RuBP

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8. C3 and C4 plants differ with respect to
(a) Number of ATP molecules consumed
(b) First product
(c) The substrate which accepts carbon dioxide
(d) All

Answer

Answer: (d) All

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9. In Calvin cycle, 1 molecule of glucose is formed from
(a) 6CO₂ + 30ATP + 12NADPH
(b) 6CO₂ + 12ATP
(c) 6CO₂ + 18ATP + 12NADPH
(d) 6CO₂ + 18ATP + 30NADPH

Answer

Answer: (c) 6CO₂ + 18ATP + 12NADPH

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10. Where does the light reaction takes place?
(a) Grana
(b) Stroma
(c) Cytoplasm
(d) Endoplasmic reticulum

Answer

Answer: (a) Grana

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11. Electrons from the excited chlorophyll molecules of PS-II are first accepted by
(a) Pheophytin
(b) Ferredoxin
(c) Cytochrome f
(d) Cytochrome b

Answer

Answer: (a) Pheophytin

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12. Non-cyclic photophosphorylation results in the production of
(a) NADH
(b) NADPH
(c) ATP
(d) ATP and NADPH

Answer

Answer: (d) ATP and NADPH

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13. DCMU inhibits
(a) PS-I
(b) PS-II
(c) Oxidative phosphorylation
(d) It destroys chloroplast

Answer

Answer: (b) PS-II

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14. Maximum photosynthesis occurs in
(a) Blue light
(b) Red light
(c) White light
(d) Green light

Answer

Answer: (b) Red light

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15. The first acceptor of CO₂ in C4 plants is
(a) Aspartic acid
(b) Malic acid
(c) Oxaloacetic acid
(d) Phosphoenolpyruvate

Answer

Answer: (d) Phosphoenolpyruvate

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16. The first product of C4 pathway is
(a) PGA
(b) DHAP
(c) Oxaloacetate
(d) Phosphoenolpyruvate

Answer

Answer: (c) Oxaloacetate

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17. The two pigment system theory of photosynthesis was proposed by
(a) Aron
(b) Blackman
(c) Hill
(d) Emerson

Answer

Answer: (d) Emerson

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18. H₂ donor during photosynthesis is
(a) ATP
(b) NADP
(c) NADPH
(d) NADH

Answer

Answer: (c) NADPH

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19. The minerals involved in splitting reaction during photosynthesis is
(a) Potassium and manganese
(b) Magnesium and chlorine
(c) Potassium and chlorine
(d) Manganese and chlorine

Answer

Answer: (d) Manganese and chlorine

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20. The water-soluble photosynthetic pigment is
(a) Chlorophyll a
(b) Xanthophyll
(c) Anthocyanin
(d) Chlorophyll b

Answer

Answer: (c) Anthocyanin

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