Write notes on any two of the following:
Biochemical origin of lige.

Explanation

Generally, it is considered that before the origin of life, some organic molecules were formed from water and some components from primordial earth.s atmosphere. These molecules probably included nucleic acids, amino acids, short proteins and lipids.
By chance, some molecules of RNA may have enzymatic properties, catalysing the assembly of copies of themselves from the nucleotides in earth.s water and these may have been the forerunners of life. Protein-lipid microspheres enclosing these RNA molecules may have formed the first cell-like organisms called a protocells.