Question

proteins are made up of chains of amino acids. amino acids have carboxyl groups, which are made up of which two types of atoms? a. hydrogen and nitrogen b. carbon and oxygen c. nitrogen and oxygen d. carbon and phosphorus

Explanation:

The carboxyl group has the formula -COOH. From this formula, we can see that the atoms present are carbon (C) and oxygen (O).

Answer:

B. Carbon and oxygen