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Question (21)

QN001621

Oxygen bubbles observed in an aquatic plant setup kept in sunlight indicate

(A) respiration
(B) transpiration
(C) photosynthesis
(D) germination

Correct Answer: C

Explanation:

Oxygen bubbles are produced during photosynthesis.

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Question (22)

QN001622

A glowing matchstick burns brightly in the gas collected from a photosynthesising plant because the gas is rich in

(A) nitrogen
(B) carbon dioxide
(C) oxygen
(D) hydrogen

Correct Answer: C

Explanation:

Oxygen supports burning.

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Question (23)

QN001623

Glucose produced during photosynthesis acts as

(A) a waste product only
(B) an instant source of energy
(C) a mineral
(D) a pigment

Correct Answer: B

Explanation:

Glucose provides energy to plants.

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Question (24)

QN001624

Excess glucose formed during photosynthesis is commonly converted into

(A) protein
(B) fat
(C) starch
(D) chlorophyll

Correct Answer: C

Explanation:

Excess glucose is stored as starch.

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Question (25)

QN001625

Which one is the correct word equation for photosynthesis?

(A) Glucose + Oxygen → Carbon dioxide + Water + Energy
(B) Carbon dioxide + Water → Glucose + Oxygen
(C) Water + Oxygen → Carbon dioxide + Glucose
(D) Carbon dioxide + Oxygen → Water + Glucose

Correct Answer: B

Explanation:

Photosynthesis forms glucose and oxygen.

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Question (26)

QN001626

Which scientist from India studied the effects of water and temperature on photosynthesis?

(A) Kamala Sohonie
(B) Jagadish Chandra Bose
(C) Rustom Hormusji Dastur
(D) C.V. Raman

Correct Answer: C

Explanation:

Rustom Hormusji Dastur studied photosynthesis.

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Question (27)

QN001627

Rustom Hormusji Dastur worked mainly in the field of

(A) zoology
(B) plant science
(C) astronomy
(D) medicine

Correct Answer: B

Explanation:

He was a plant scientist.

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Question (28)

QN001628

Leaves that appear red or violet can still perform photosynthesis because

(A) starch replaces chlorophyll
(B) other pigments help in photosynthesis
(C) they absorb food from soil
(D) they do not require sunlight

Correct Answer: B

Explanation:

Other pigments assist in photosynthesis.

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Question (29)

QN001629

Which observation confirms that photosynthesis has taken place in a red leaf?

(A) Formation of roots
(B) Increase in leaf size
(C) Blue-black colour with iodine test
(D) Release of nitrogen

Correct Answer: C

Explanation:

Starch formation confirms photosynthesis.

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Question (30)

QN001630

If a green plant receives sunlight and water but no carbon dioxide, it will not produce

(A) oxygen
(B) chlorophyll
(C) starch
(D) roots

Correct Answer: C

Explanation:

Carbon dioxide is essential for starch formation.

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Question (21)

Oxygen bubbles observed in an aquatic plant setup kept in sunlight indicate

Explanation:

Link:

Question (22)

A glowing matchstick burns brightly in the gas collected from a photosynthesising plant because the gas is rich in

Explanation:

Link:

Question (23)

Glucose produced during photosynthesis acts as

Explanation:

Link:

Question (24)

Excess glucose formed during photosynthesis is commonly converted into

Explanation:

Link:

Question (25)

Which one is the correct word equation for photosynthesis?

Explanation:

Link:

Question (26)

Which scientist from India studied the effects of water and temperature on photosynthesis?

Explanation:

Link:

Question (27)

Rustom Hormusji Dastur worked mainly in the field of

Explanation:

Link:

Question (28)

Leaves that appear red or violet can still perform photosynthesis because

Explanation:

Link:

Question (29)

Which observation confirms that photosynthesis has taken place in a red leaf?

Explanation:

Link:

Question (30)

If a green plant receives sunlight and water but no carbon dioxide, it will not produce

Explanation:

Link:

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