11

12th Biology test 1

1 / 35

What does operon model represent ?

2 / 35

Which of the following forms endosperm after fusion with male
gamete ?

3 / 35

Fossils are generally found in –

4 / 35

During which process Okazaki fragments are synthesized ?

5 / 35

Human antibodies are made of –

6 / 35

Which one is not a hydrophytic plant ?

7 / 35

Which is the number of chromosomes in Turner’s syndrome ?

8 / 35

Opium is obtained from –

9 / 35

𝐵-lymphocytes are produced in –

10 / 35

Which infective stage of Plasmodium occurs in human ?

11 / 35

Ti-plasmid is obtained from which of the following ?

12 / 35

‘Cry-gene’ prevents which crop from bollworm ?

13 / 35

Termination codon is –

14 / 35

DNA double helix is –

15 / 35

Which organelle is not present in the cytoplasm of ovum ?

16 / 35

Which enzyme is required in the process of transcription ?

17 / 35

Wings of insects and birds are called as -

18 / 35

Relaxin is secreted by –

19 / 35

Which one is pioneer in a xerosere ?

20 / 35

Which of the following is a heavy-metal water pollutants ?

21 / 35

Ovulation takes place in –

22 / 35

Where is the Ranthambore National Park situated ?

23 / 35

Sex chromosome of human beings are –

24 / 35

The mobile genetic element is –

25 / 35

Peripatus is connecting link between –

26 / 35

Hugo de Vries proposed –

27 / 35

Transgenic ‘hirudin’ is obtained from which of the following?

28 / 35

Entamoeba histolytica is a pathogen of which disease in the
following?

29 / 35

The two components of an ecosystem are –

30 / 35

Reproduction which does not involve gametic union is called ?

31 / 35

Eutrophication is found in –

32 / 35

The F2 phenotypic ratio in dihybrid cross is –

33 / 35

Roots of which plant give rise to a new plant ?

34 / 35

Which one is an example of endomycorrhiza ?

35 / 35

What causes acid rain ?

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