M.C.Q

MCQ 11 Mark

Which of the following is not associated with the growth of a plant?

A
Auxin
B
Cytokinins
✓
Abscisic acid
D
Gibberellins

Answer

Correct option: C.

Abscisic acid

(c) Abscisic acid
Explanation :
Abscisic acid inhibits the growth of plant hence it is not associated with the growth of the plant.

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MCQ 21 Mark

In the slides showing binary fission in Amoeba and budding in yeast, the correct observations are :
A. The daughter cells of Amoeba and the bud of Yeast are smaller than their respective parental cells.
B. The daughter cells of Amoeba and the bud of Yeast are the same sizes as their respective parental cells.
C. The daughter cells of Amoeba are bigger than the parent cell but the bud of yeast is smaller than the parent.
D. The daughter cells of Amoeba are smaller than the parent but the bud of Yeast is larger than the parent.

A
(B)
✓
(A)
C
(D)
D
(C)

Answer

Correct option: B.

(A)

(B) (A)
Explanation :
(A) is the correct observation.
Daughter cells originate as small buds of the parent cell and grow very fast. Daughter cells remain attached to parent cells and separate later on. And the daughter cells of Amoeba and the bud of Yeast are smaller than their respective parental cells.

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MCQ 31 Mark

Food web is constituted by

A
relationship between plants and animals
B
relationship between the organisms and the environment
C
relationship between animals and environment.
✓
various interlinked food chains in an ecosystem

Answer

Correct option: D.

various interlinked food chains in an ecosystem

(D) various interlinked food chains in an ecosystem
Explanation :
A food chain is a series of plants/animals which are interrelated in the form of an organism being eaten as food by the other. The Food web is constituted by various interlinked and interdependent food chains in a community. It is also called a consumer-resource system. The ecosystem consists of living organisms and their abiotic environment. Thus, the correct answer is 'Various interlinked food chains in a community.

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MCQ 41 Mark

Which part of the following is a site of implantation?

A
D
✓
A
C
C
D
B

Answer

Correct option: B.

(B) A
Explanation :
Uterus is a site of implantation.

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MCQ 51 Mark

Which part of the leaf will have starch when exposed to sunlight ?

A
C only
✓
Both A and B
C
B only
D
A only

Answer

Correct option: B.

Both A and B

(B) Both A and B
Explanation :
Uncovered portion of the leaf is exposed to the light and photosynthesis reaction takes place there.
$6 \mathrm{CO}_2+12 \mathrm{H}_2 \mathrm{O} \xrightarrow[\text { Chlorphyll }]{\text { Sunlight }} \mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6+6 \mathrm{H}_2 \mathrm{O}+6 \mathrm{O}_2$

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MCQ 61 Mark

The two versions of a trait (character) which are brought in by the male and female gametes are situated on

A
sex chromosomes
✓
copies of the same chromosome
C
two different chromosomes
D
any chromosome

Answer

Correct option: B.

copies of the same chromosome

(B) copies of the same chromosome
Explanation :
The two versions of a trait that are brought in by the male and female gametes are situated on copies of the same chromosome. Each parent contributes one copy of the gene for a particular trait.

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MCQ 71 Mark

Where does the embryo develop in a human female?

A
Vagina
B
Seminal vesicles
C
Fallopian tube
✓
Uterus

Answer

Correct option: D.

Uterus

(D) Uterus
Explanation :
The fertilized embryo gets attached to the uterus and all the developmental process of the embryo takes place in the uterus.

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