NEET TEST SERIES 108 BIOLOGY

1. If the growing plant is decapitated, then

(a) its growth stops
(b) leaves become yellow and fall down
(c) axillary buds are inactivated
(d) axillary buds are activated.

2. You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

(a) IAA and gibberellin
(b) Auxin and cytokinin
(c) Auxin and abscisic acid
(d) Gibberellin and abscisic acid

3. Syngamy can occur outside the body of the organism in

(a) mosses
(b) algae
(c) ferns
(d) fungi.

4. The term ‘polyadelphous’ is related to

a) gynoecium
b) androecium
c) corolla
d) calyx.

5. The movement of auxin is largely

(a) centripetal
(b) acropetal
(c) basipetal
(d) both (a) and (c)

6. Match the following:

Options:

a) 1-ii, 2-i, 3-iv, 4-iii
b) 1-ii, 2-iii, 3-iv, 4-i
c) 1-iv, 2-i, 3-ii, 4-iii
d) 1-iv, 2-iii, 3-i, 4-ii

7. A and B genes are linked. What shall be genotype of progeny in a cross between ABab and abab?

(a) Aabb and aabb and aabb
(b) AABB
(c) AaBb and aabb
(d) AaBb and AaBb

8. A gene is said to be recessive if

a) It expressed its effect in the absence of dominant gene
b) It expressed only in heterozygous condition
c) It expressed both in homozygous and heterozygous condition
d) None of above

9. Evolutionary convergence is development of

a) Random mating
b) Common set of characters in closely related groups
c) Dissimilar characters in closely related groups
d) Common set of characters in group of different ancestry

10. Which experiment suggests that simplest living organisms could not have originated from non-living matter?

a) Microbes did not appear in stored meat
b) Microbes appeared from unsterilized organic matter
c) Larvae could appear in decaying organic matter
d) Meat was not spoiled when heated and kept in sealed vessel.

11. Similarities in organism with different genotype indicates:

a) Microevolution
b) Macroevolution
c) Convergent evolution
d) Divergent evolution

12. Plasmid pBR322 has PstI restriction enzyme site within gene ampR that confers ampicillin resistance. If this enzyme is used for inserting a gene for B-galactoside production and the recombinant plasmid is inserted in an E.coli strain

a) The transformed cells will have the ability to resist ampicillin as well as produce B galactoside
b) It will not be able to confer ampicillin resistance to host cell
c) It will lead to lysis of host cell
d) It will be able to produce a novel protein with dual ability

13. Which of the following is not a desirable feature of a cloning vector?

a) Presence of origin of replication
b) Presence of a marker gene
c) Presence of two or more recognition site
d) Presence of single restriction enzyme site

14. Which of the following statement is incorrect about Agrobacterium tumefaciens?

a) It delivers T-DNA into plant cells
b) It is used to deliver gene of interest in both prokaryotic and eukaryotic host cells
c) It transform normal plant cell into tumour cell
d) It is not pathogenic to plant cell

15. Transgenic expression of transgene in target tissue is determine by

(a) Promoter
(b) Transgene
(c) Reporter
(d) Enhancer

16. Competition for light, nutrients and space is more severe between

a) Closely related organism growing in different niches
b) Closely related organism growing in same niche
c) Distantly related organism growing in different habitat
d) Distantly related organism growing in same niche

17. The dominant second trophic level in a lake ecosystem is

(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes

19. Which example shows Gause Exclusion Principle?

a) Resident fishes and visiting flamingoes in South American shallow lake
b) Abingdon tortoise and goat in Galapagos Island
c) Pisasters and mussels in rocky intertidal coast
d) Warbler species inhabiting the same tree

20. Which of the following will be easily cut by a specific restriction endonuclease?

a) 5’ GTATTC3’ ; 3’CATAAG5’
b) 5’GATACT3’ ; 3’CTATGA5’
c) 5’GAATTC3’ ; 3’CTTAAG5’
d) 5’CTCAGT3’ ; 3’GAGTCA5’