Question

select all that apply select the four elements found in all amino acids. carbon hydrogen nitrogen phosphorus oxygen sulfur

Explanation:

Amino acids have a general structure with an amino group (-NH₂), a carboxyl group (-COOH), and a side - chain. The amino group contains nitrogen and hydrogen, the carboxyl group contains carbon, oxygen and hydrogen. Carbon is also part of the backbone and side - chain. So carbon, hydrogen, nitrogen and oxygen are present in all amino acids. Phosphorus and sulfur are not present in all amino acids.

Answer:

Carbon
Hydrogen
Nitrogen
Oxygen