8

12th Biology test-3

1 / 35

Which one in the following crosses shows phenotypic ratio of 3:1 ?

2 / 35

“Gametes are never hybrid”, it is statement of -

3 / 35

In a lake, phytoplanktons grow abundantly in –

4 / 35

The feature of the xerophytic plant leaves are –

5 / 35

In genetic engineering, restriction enzymes can be used for –

6 / 35

Nif-genes are associated with –

7 / 35

Which of the following cannot be detected in a developing foetus by
amniocentesis ?

8 / 35

How oral contraception pills used by females help in birth control

9 / 35

HIV attacks on –

10 / 35

The most famous symbiotic nitrogen fixing bacterium is –

11 / 35

BOD level in fresh water should not exceed beyond –

12 / 35

Decolouration of lead and silver paints is caused due to –

13 / 35

Lohi is a breed of –

14 / 35

Which of the following is not a fresh water fish ?

15 / 35

Toxin produced by tetanus mainly affects –

16 / 35

Advancement in genetic engineering has been possible due to
whom?

17 / 35

Which of the following enhances or induces fusion of protoplast ?
(A) IAA and kinetin
(B) IAA and gibberellins
(C) Polyethylene glycol and sodium nitrate
(D) Sodium chloride and potassium chloride

18 / 35

Golden rice is a GMO plant in which the incorporated gene is meant for biosynthesis of –

19 / 35

Which plant is found in mangrove zone ?

20 / 35

Reduction in vascular tissue, mechanical tissue and cuticle is
characteristic feature of whom ?

21 / 35

Plants growing on rocks are called as –

22 / 35

Parasitic angiosperms are -

23 / 35

Antibiotic cephalosporin is obtained from which one in the following?

24 / 35

Induced abortion is –

25 / 35

Who discovered the molecular structure of Insulin ?

26 / 35

Characteristic of blue-green algae is –

27 / 35

Saffron is obtained from which plant ?

28 / 35

Heart is developed from –

29 / 35

Which one is analysed by amniocentesis ?

30 / 35

During menstrual cycle, the cyclic changes take place in –

31 / 35

'Genotype-Phenotype’ concept was first proposed by

32 / 35

Which transgenic plant is rich in 𝛽–carotene and ferritin in the
following ?

33 / 35

Rejection of organ transplant is due to –

34 / 35

Archaeopteryx was evolved during which period of era ?

35 / 35

Sunken stomata is found in –

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