Question

Four major classes of organic compounds found in living organisms are proteins, carbohydrates, _____.

Answer 1

Answer:
______________________________________
The remaining 2 (two) are:
________________________________________
lipids;
nucleic acids (specifically, DNA and RNA).
__________________________________

Answer 2

Nucleic acids and lipids.

Step-by-step explanation:

Biomolecules may be defined as the organic molecules present in the living organism that plays the important role in their growth and metabolism. Four important biomolecules are carbohydrate, protein, nucleic acids and lipids.

Carbohydrate is the polymer of sugars. Amino acids are linked together to forms the proteins. Nucleic acids are the polymers of the nucleotides. Lipids constitute of the hydrocarbon chain and hydrophilic carboxylic acid group.

Thus, the answer is nucleic acids and lipids.