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Question (21)

QN001701

Which of the following is NOT a product of respiration?

(A) Carbon dioxide
(B) Water
(C) Energy
(D) Chlorophyll

Correct Answer: D

Explanation:

Chlorophyll is not produced during respiration.

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Question (22)

QN001702

Which part of the plant respires most actively during germination?

(A) Dry seed coat
(B) Germinating embryo
(C) Flower petals
(D) Bark

Correct Answer: B

Explanation:

Germinating embryo respires actively.

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Question (23)

QN001703

If stomata are blocked completely, respiration in leaves will be affected because

(A) food preparation stops immediately
(B) gaseous exchange becomes difficult
(C) roots stop absorbing water
(D) chlorophyll disappears

Correct Answer: B

Explanation:

Stomata are needed for gaseous exchange.

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Question (24)

QN001704

Which observation best indicates respiration in germinating seeds?

(A) Blue-black colour with iodine
(B) Release of oxygen bubbles
(C) Lime water turning milky
(D) Red colour in stem

Correct Answer: C

Explanation:

Carbon dioxide from respiration turns lime water milky.

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Question (25)

QN001705

Which statement correctly compares photosynthesis and respiration?

(A) Both release oxygen only
(B) Both occur only in leaves
(C) Photosynthesis stores energy while respiration releases energy
(D) Respiration occurs only in sunlight

Correct Answer: C

Explanation:

Photosynthesis stores energy, respiration releases it.

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Question (26)

QN001706

The pores present on stems for gaseous exchange are called

(A) stomata
(B) xylem
(C) lenticels
(D) phloem

Correct Answer: C

Explanation:

Lenticels help in gaseous exchange in stems.

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Question (27)

QN001707

Which condition is essential for aerobic respiration in plants?

(A) Presence of chlorophyll
(B) Presence of sunlight
(C) Presence of oxygen
(D) Presence of flowers

Correct Answer: C

Explanation:

Aerobic respiration requires oxygen.

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Question (28)

QN001708

Which of the following is a direct source of energy for cellular activities?

(A) Starch
(B) ATP
(C) Chlorophyll
(D) Carbon dioxide

Correct Answer: B

Explanation:

ATP is the direct energy source for cells.

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Question (29)

QN001709

A rise in temperature during seed germination occurs mainly because

(A) chlorophyll is produced
(B) respiration releases heat energy
(C) water evaporates rapidly
(D) starch absorbs heat

Correct Answer: B

Explanation:

Respiration releases heat energy.

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Question (30)

QN001710

Which gas enters the plant during respiration?

(A) Carbon dioxide
(B) Oxygen
(C) Nitrogen
(D) Hydrogen

Correct Answer: B

Explanation:

Oxygen enters during respiration.

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Question (21)

Which of the following is NOT a product of respiration?

Explanation:

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Question (22)

Which part of the plant respires most actively during germination?

Explanation:

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Question (23)

If stomata are blocked completely, respiration in leaves will be affected because

Explanation:

Link:

Question (24)

Which observation best indicates respiration in germinating seeds?

Explanation:

Link:

Question (25)

Which statement correctly compares photosynthesis and respiration?

Explanation:

Link:

Question (26)

The pores present on stems for gaseous exchange are called

Explanation:

Link:

Question (27)

Which condition is essential for aerobic respiration in plants?

Explanation:

Link:

Question (28)

Which of the following is a direct source of energy for cellular activities?

Explanation:

Link:

Question (29)

A rise in temperature during seed germination occurs mainly because

Explanation:

Link:

Question (30)

Which gas enters the plant during respiration?

Explanation:

Link:

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