SMATEE TEST SERIES 22 BIOLOGY

1. The anther in transverse section appears to be

(a) Diagonal
(b) Tetragonal
(c) Unilobed
(d) Mosaic

2. What are A, B, C and D in this figure?


a) A: Thalamus, B: Style, C: Ovary, D: Stigma
b) A: Style, B: Ovary, C: Stigma, D: Thalamus
c) A: Stigma, B: Style, C: Ovary, D: Thalamus
d) A: Ovary, B: Stigma, C: Thalamus, D: Style

3. Tetragonal anther consists of

a) One microsporangia
b) Two microsporangia
c) Three microsporangia
d) Four microsporangia

4. How many microsporangia are there in each lobe of anther?

a) One microsporangia
b) Two microsporangia
c) Three microsporangia
d) Four microsporangia

5. Which one amongst the given perform the function of protection in typical microsporangium?
(A) Epidermis      (B) Endothecium
(C) Tapetum        (D) Middle layer

(a) A and B 
(b) A and C
(c) A and D
(d) A, B and D

6. Function performed by the outer three layers of microsporangium?

a) Protection to developing pollen
b) Provides nourishment to developing pollen
c) Helps in the dehiscence of anther to release pollen
d) Both (a) and (c)

7. Formation of pollen from pollen mother cell is referred to as

a) Pollenogenesis
b) Megasporogenesis
c) Microsporogenesis
d) Ovulation

8. Male gametophyte in angiosperm is represented by

a) Anther
b) Androecium
c) Microsporangium
d) Pollen grain

9. Pollen grains are

a) Spherical
b) Oval
c) Generally spherical
d) Irregular

10. Exine of pollen is
(A) Hard outer layer of pollen grain
(B) Most resistant organic matter known.
(C) Layer made up of sporopollenin.
(D) Layer which can withstand high temperature, strong acids and alkali.
(E) Layer which cannot be degraded by any known enzyme.
Which one of the following is correct?

a) A and B
b) A, B, C and D
c) A, B, C, D and E
d) A, C and E

11. At which sub-stage of prophase-I are homologous chromosomes fully paired and synapsis completed?

(a) Leptotene
(b) Zygotene
(c) Pachytene
(d) Diplotene

12. Assertion: Crossing over involves the exchange of genetic material between non sister chromatids of homologous chromosomes.
     Reason: Crossing over occurs in diplotene stage of prophase-I

a) Both assertion and reason are true and reason is the correct explanation of assertion.
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but Reason is false.
d) Assertion is false but Reason is true.

13. Match the features (Column-I) with their stages (Column-II).

Choose the correct answer from the following options.

(a) (a)-(iv), (b)-(iii), (c)-(i), (d)-(i)
(b) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
(c) (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
(d) (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

14. In which stage of meiosis II, the chromosomes are composed of two chromatids?

(a) Prophase II and Metaphase II
(b) Anaphase II and Telophase II
(c) Prophase II and Telophase II
(d) Metaphase II and Anaphase II

15 .In which of the following stage, the terminalisation occurs?

(a) Zygotene
(b) Pachytene
(c) Diakinesis
(d) Diplotene

16. The stage of meiosis where centromere divides for the first and the only time, ensuring separation of daughter chromosomes, occur in

(a) anaphase-II
(b) telophase-I
(c) anaphase-I
(d) telophase- II.

17. Enzyme responsible for fixing crossed over parts of non-sister chromatids is

(a) lipase
(b) recombinase
(c) ligase
(d) endonuclease.

18. Swollen bead like areas considered to be genes can be observed on chromosomes in subphase of meiosis.

(a) leptotene
(b) zygotene
(c) pachytene
(d) diakinesis

19. In tetrad, crossing over does not take place between

(a) non-sister chromatids of outer group
(b) sister chromatids of dyad
(c) outermost and innermost non-sister chromatids
(d) all of these.

20. In meiosis I, nuclear membrane and nucleolus completely disappear during

(a) zygotene
(b) pachytene
(c) diakinesis
(d) metaphase.