Question

The four fundamental types of organic molecules are nucleic acids, proteins, lipids, and ________.

Answer 1

The other of the four organic molecules is carbohydrates.
All four of them are:
Nucleic Acids (DNA and RNA stuff)
Proteins
Lipids
& Carbohydrates

Answer 2

Carbohydrates

Step-by-step explanation:

Organic compounds are made of four fundamental type organic molecules which also called biological macro molecules. These fundamental types molecules are

1. Nucleic Acids

2. Proteins

3. Lipids

4. Carbohydrates

Macro molecules are made of single unit called monomer and these monomer are joined covalent bonds to form larger polymers.