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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.

1.	I, II, III, IV	2.	I, III, II, IV
3.	II, III, I, IV	4.	II, III, IV, I

Subtopic: Origin of Life: Chemical Evolution: 1 | Origin of Life |

Level 3: 35%-60%

NEET - 2016

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Following are the two statements regarding the origin of life:

I:	The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
II:	The first autotrophic organisms were the chemoautotrophs that never released oxygen.

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

1. II is correct but I is false
2. Both I and II are correct
3. Both I and II are false
4. I is correct but II is false

Subtopic: Origin of Life: Chemical Evolution: 2 | Origin of Life |

75%

Level 2: 60%+

NEET - 2016

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