(Download) CBSE Class-12 Sample Paper 2021-22 : Biology

Sample Question Paper (Term-1) 2021-22

Subject Name : Biology

Subject Code : 044

Time Allowed: 90

Minutes Maximum Marks: 40

SECTION - A

Section – A consists of 24 questions. Attempt any 20 questions from this section. The first attempted 20 questions would be evaluated.

1 The structure of bilobed anther consists of
A. 2 thecae, 2 sporangia
B. 4 thecae, 4 sporangia
C. 4 thecae, 2 sporangia
D. 2 thecae, 4 sporangia
2 In the figure of anatropous ovule given below, choose the correct option for the characteristic distribution of cells within the typical embryo sac

Number of cells at chalazal end                                Number of cells at micropylar end                         Number of nuclei left in central cell

A                                3                                                                                     2                                                                              3
B                                3                                                                                     3                                                                              2
C                                2                                                                                     3                                                                              3
D                                2                                                                                     2                                                                              4

3 The coconut water from tender coconut is

A. cellular endosperm.

B. free nuclear endosperm.

C. both cellular and nuclear endosperm.

D. free nuclear embryo.

4 Pollen grains are well preserved as fossils because of presence of

A. sporopollenin

B. cellulose

C. lignocellulose

D. pectocellulose

5 Which of the following statements are true related to Seed X and Y?

(i) Seed X is dicot and endospermic or albuminous.

(ii) Seed X is dicot and non-endospermic or non-albuminous.

(iii) Seed Y is monocot and endospermic or albuminous.

(iv) Seed Y is monocot and non-endospermic or non-albuminous.

Choose the correct option with the respect to the nature of the seed

A. (i), (iii)

B. (ii), (iii)

C. (i), (iv)

D. (ii), (iv)

6 Which of the following statements are correct with respect to hormones secreted by placenta?

(i) Placenta secretes relaxin during later stage of pregnancy.

(ii) Placenta secretes high amount of FSH during pregnancy.

(iii) Placenta secretes relaxin during initial stage of pregnancy.

(iv) Placenta secretes hCG and hPL during pregnancy.

A. (i) and (iv)

B. (i), (ii) and (iv)

C. (iii) and (iv)

D. (ii), (iii) and (iv)

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