Main Concepts of Life Science TNPSC Group 2 2A Questions

Botany & Zoology

Main Concepts of Life Science MCQ Questions

7.

Consider the statements:

I. Viruses are obligatory endoparasites of living cells.

II. Viruses have genetic material.

III. Viruses can be crystallized.

IV. Viruses do not have mitochondria. Of these statements:

A.

I alone is correct

B.

I and II are correct

C.

I,II and III are correct

D.

All the above

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ANSWER :

D. All the above

8.
Which of the following is NOT correctly matched?
A.
Auxin - Cell enlargement
B.
Gibberellin - Amylase synthesis
C.
Cytokinin - promotes ageing process
D.
Ethylene - Fruit ripening
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ANSWER :
C. Cytokinin - promotes ageing process
9.
The unicellular algae used in space craft to regulate oxygen supply is
A.
Chlamydomonas
B.
Chlorella
C.
Anabaena
D.
Spirogyra
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ANSWER :
B. Chlorella
10.
which one of the following statements regarding starch and cellulose is NOT correct?
A.
Starch and cellulose both are of plant origin
B.
Starch and cellulose both are polymers.
C.
Starch and Cellulose both gives blue-black color with Iodine
D.
Starch and cellulose both are made up of glucose molecules
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ANSWER :
C. Starch and Cellulose both gives blue-black color with Iodine
11.
Diffusion means
A.
the passage of water molecule from lower concentration to higher concentration
B.
the movement of molecules from a regoin of greater concentration to lesser concentration
C.
the movement of molecules from cell to cell
D.
water molecule movement in a dead cell
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ANSWER :
B. the movement of molecules from a regoin of greater concentration to lesser concentration
12.
based on the cellular type the algae chlorella belongs to
A.
Autotrophs
B.
Eukaryotes
C.
Prokaryotes
D.
Both A and B
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ANSWER :
D. Both A and B