Question

The proposed primordial soup was composed of organic precursor molecules formed by the interactions of which among the following gases:

• A. hydrogen
• B. carbon
• C. nitrogen
• D. all of these

Answer 1

The correct option is D all of these

Oparin and Haldane proposed that the first form of life could have come from the pre-existing non-living organic molecules. They believed that the origin of life (biological evolution) was preceded by chemical evolution.

They proposed the theory of the chemical origin of life. According to this theory, free atoms like carbon, hydrogen, nitrogen, and small amounts of oxygen bonded together in various ways forming molecules like methane, ammonia etc,

Condensation and polymerisation of ammonia, hydrocarbons and water due to energy sources like UV rays and other radiations lead to the formation of simple organic monomers like amino acids, fatty acids and sugars. The simple organic monomers reacted to form the complex organic polymers like RNA and proteins. Further reactions between these molecules would have led to the formation of the first cell. All these reactions occurred in the sea forming a primordial soup.