The four fundamental types of organic molecules are nucliec acids, proteins, carbohydrates and

Carbohydrates, Nucleic acids, Proteins, and Lipids

A carbohydrate is a biological molecule consisting of carbon, hydrogen and oxygen atoms, usually with a hydrogen–oxygen atom ratio of 2:1.

Nucleic acids are bio-polymers, or large bio-molecules, essential for all known forms of life.

Proteins are large bio-molecules, or macro-molecules, consisting of one or more long chains of amino acid residues.


In biology, lipids comprise a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins, monoglycerides, diglycerides, triglycerides, phospholipids, and others.

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Hydrosphere is the correct answer