Evolution

MCQs

1. From his experiments, SL Miller produced amino acids by mixing the following in a closed flask.

a. Methane, Hydrogen, Ammonia and water vapour at 800 C

b. Methane, Hydrogen, NH4 and water vapour at 800 C

c. Methane, Hydrogen, Ammonia and water vapour at 600 C

d. Methyl, Hydrogen, Ammonia and water vapour at 800 C

Ans. a. 

2. Which of the following is the correct sequence of events in the origin of life?

I. Formation of protobionts

II. Synthesis of organic monomers

III. Synthesis of organic polymers

IV. Formation of DNA-based genetic systems

a. I, II, III, IV, b. I,III, II, IV, c. II, III, I, IV, d. II, III, IV, I

Ans. c.

3. Following are the two statements regarding the origin of life

A. The earliest organisms that appeared on the Earth were non-green and presumably anaerobs.

B. The first autotrophic organisms were the chemoautotrophs that never released oxygen

Of the above statements which one of the following options is correct?

a. Both A and B are correct

b. Both A and B are false

c. A is correct but B is false

d. B is correct but A is false

Ans. a

4. Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?

a. They were partially isolated from the surroundings

b. They could maintain an internal environment

c. They were able to reproduce

d. They could separate combinations of molecules from the surroundings

Ans. c.

5. The concept of chemical evolution is based on 

a. interaction of water, air and clay under intense heat

b. effect of solar radiation in chemicals

c. possible origin of life by combination of chemicals under suitable environmental conditions

d. crystallisation of chemicals

Ans. c.

6. Which of the following amino acids was not found to be synthesised in Miller's experiment?

a. Alanine, b. Glycine, c. Aspartic acid, d. Glutamic acid

Ans. d

7.Which one of the following experiments suggest that simplest living organisms could not have originated spontaneously from non-living matter?

a. Larvae could appear in decaying organic matter

b. Microbes did not appear in stored meat

c. Microbes appeared from unsterilised organic matter

d. Meat was not spoiled, when heated and kept sealed in a vessel

Ans. d.

8. According to Oparin, which one of the following was not present in the primitive atmosphere of the Earth?

a. Methane, b. Oxygen, c. Hydrogen, d. Water vapour

Ans. b.

9. There is no life on moon due to absence of 

a. O2, b. water, c. light d. temperature

Ans. b.

10.Most abundant organic compound on earth is 

a. protein, b. cellulose, c. lipids, d. steroids.

Ans. b