Question

From the point of view of early chemical evolution that preceded the origin of life on earth, the most important simple organic molecules formed were
A) Sugars and amino acids
B) Glycerol and fatty acids
C) Purines and Pyrimidines
D) All of the above

Answer 1

Hint: The primitive of the chemical changes give rise to the first form of life called chemical evolution. prokaryotes are the first living things on the earth with the type of cells similar to the present bacteria origin of life invoked by the chemical and physical conditions of the primitive Earth that preceded the chemical evolution of organic chemicals.

Complete answer:
Simple organic molecules such as sugars, Nitrogenous bases, and amino acids, glycerol, fatty acid, etc, are produced by the interaction of early inorganic molecules.
Sugars (e.g., ribose, deoxyribose, glucose, etc.)
Nitrogenous bases (e.g., purines, pyrimidines)
${ CH }_{ 4 }+{ CO }_{ 2 }+{ H }_{ 2 }O\rightarrow Sugars+Glycerol+Fatty\quad acids,etc.$
${ CH }_{ 4 }+{ HCN+NH }_{ 3 }+{ H }_{ 2 }O\rightarrow Purines+Pyrimidines$
${ CH }_{ 4 }+{ NH }_{ 3 }+CO_{ 2 }+{ H }_{ 2 }O\rightarrow Amino\quad acids.$

Additional Information: 

> About 4 billion years ago the first organic molecules were formed, which happened when in the earth's early atmosphere, lightning-sparked chemical reactions.

> The first organic molecule to form is RNA; it is the basis of early life is the RNA.
> In the early Earth's atmosphere the random interaction of the molecules formed complex organic molecules such as amino acids, sugars, fatty acids, and nitrogen bases (the building blocks of life)
> The energy which is needed to form these organic molecules taken from the sun's radiations, electrical discharge from the lightning, and heat from the cooling Earth.
> The" organic soap "formed by the accumulation of organic compounds in which additional reactions could take place.

So, the correct answer is,” All of the above”.

Note: 

> The prebiotic evolution of self-replicating molecules evolved from the chemical reactions which are driven by the geological conditions on the early Earth.
> The chemical compound is derived from the ancestral organisms found in all the living prokaryotic and eukaryotic cells in the present day.