Question

What are the $4$ major classes of organic molecules found in living things?

Answer 1

Hint : Organic molecules are chemical compounds that are associated with living organisms and contain carbon. Organic chemistry deals with organic molecules, which are compounds that are involved in life processes.

Complete Step By Step Answer:
The $4$ major types of organic molecules found in living organisms are:
-carbohydrates
-proteins
-lipids
-nucleic acids

Carbohydrates: Carbohydrates are considered to be a source of energy for almost all organisms. Carbohydrates also act as structural materials in some cases. Carbohydrates are carbon, hydrogen, and oxygen molecules with a $2:1$ ratio of hydrogen to oxygen and carbon atoms.
Proteins: Amino acids, which include carbon, hydrogen, oxygen, and nitrogen atoms, make up proteins, and are amid the most complex of all organic compounds. Sulfur atoms, phosphorus, and other trace elements including iron and copper can be found in certain amino acids.
Lipids: Carbon, hydrogen, and oxygen atoms make up lipids, which are organic molecules. In lipids, the proportion of hydrogen to oxygen atoms is much higher than in carbohydrates. Steroids (the building blocks of several hormones), waxes, and fats are all lipids.
Nucleic Acids: Nucleic acids, like proteins, are massive molecules. Nucleic acids consist of nucleotides, which are smaller units. Each nucleotide contains a sugar molecule, a phosphate group, and a nitrogen-containing molecule that is a nitrogenous base due to its properties.

Note :
All organic molecules have four characteristics in common:
They all contain carbon.
The vast majority of them are flammable.
They're all non-polar solvent soluble.
They are covalently bound molecules in the majority.