Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Assertion (A): The final product of respiration is glucose.
Reason (R): The glucose ultimately gets converted into the starch.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
✓
A is false but R is true.

Answer

Correct option: D.

A is false but R is true.

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MCQ 21 Mark

Assertion (A): The iodine solution indicates the presence of starch in the leaves.
Reason (R): The red-yellow colour confirms the presence of starch in the leaves.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
✓
A is true but R is false.
D
A is false but R is true.

Answer

Correct option: C.

A is true but R is false.

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MCQ 31 Mark

Assertion (A): Green pigment found in the plant’s leaves is called chlorophyll.
Reason (R): Chlorophyll is responsible for the green colour of the plants.

A
Both A and R are true and R is the correct explanation of A.
✓
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.

Answer

Correct option: B.

Both A and R are true but R is not the correct explanation of A.

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MCQ 41 Mark

Assertion (A): All parts of a plant, green or non-green, carry out respiration.
Reason (R): Water is broken down in the presence of oxygen during respiration.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
✓
A is true but R is false.
D
A is false but R is true.

Answer

Correct option: C.

A is true but R is false.

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MCQ 51 Mark

Assertion (A): Minerals and water present in the soil are absorbed by the roots and transported to leaves.
Reason (R): Carbon dioxide from air is taken through stomata present on the surface of leaves.

A
Both A and R are true and R is the correct explanation of A.
✓
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.

Answer

Correct option: B.

Both A and R are true but R is not the correct explanation of A.

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MCQ 61 Mark

Assertion (A): Sunlight, water, carbon dioxide and chlorophyll are necessary photosynthesis.
Reason (R): During photosynthesis, plants produce food in the form of starch.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.

Answer

self

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MCQ 71 Mark

Assertion (A): Red ink experiment proves water transport.
Reason (R): Red ink dissolves starch in leaves.

A
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
B
Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
✓
(A) is true, but (R) is false.
D
(A) is false, but (R) is true.

Answer

Correct option: C.

(A) is true, but (R) is false.

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MCQ 81 Mark

Assertion (A): Respiration in plants occurs only in green parts.
Reason (R): Chloroplasts are found only in green parts.

A
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
B
Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
C
(A) is true, but (R) is false.
✓
(A) is false, but (R) is true.

Answer

Correct option: D.

(A) is false, but (R) is true.

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MCQ 91 Mark

Assertion (A): Leaves are the food factories of plants.
Reason (R): They contain chlorophyll and perform photosynthesis.

✓
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
B
Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
C
(A) is true, but (R) is false.
D
(A) is false, but (R) is true.

Answer

Correct option: A.

Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).

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MCQ 101 Mark

Assertion (A): Transport in plants is essential for survival.
Reason (R): Roots alone perform all photosynthesis.

A
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
B
Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
✓
(A) is true, but (R) is false.
D
(A) is false, but (R) is true.

Answer

Correct option: C.

(A) is true, but (R) is false.

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MCQ 111 Mark

Assertion (A): Germinating seeds release carbon dioxide.
Reason (R): They are capable of photosynthesis.

A
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
B
Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
✓
(A) is true, but (R) is false.
D
(A) is false, but (R) is true.

Answer

Correct option: C.

(A) is true, but (R) is false.

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MCQ 121 Mark

Assertion (A): Oxygen is released during photosynthesis.
Reason (R): It is a by-product of respiration in plants.

A
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
B
Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
✓
(A) is true, but (R) is false.
D
(A) is false, but (R) is true.

Answer

Correct option: C.

(A) is true, but (R) is false.

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MCQ 131 Mark

Assertion (A): Water is required for photosynthesis.
Reason (R): Water is absorbed by leaves from the air.

A
Both Assertion (A) and Reason (R) are true, and (R) is the correct explanation of (A).
B
Both Assertion (A) and Reason (R) are true, but (R) is not the correct explanation of (A).
✓
(A) is true, but (R) is false.
D
(A) is false, but (R) is true.

Answer

Correct option: C.

(A) is true, but (R) is false.

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Science Assertion (A) & Reason (B) MCQ

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