Question

Which feature of an amino acid makes it essential?

A
It contains an R-group and an amine group.
B
It is necessary for life but not produced by the body
It has a primary and a secondary structure.
It is synthesized in the body.

Answer 1

it is necessary for life but not produced by the body

Step-by-step explanation:

the essentials are not synthesized in the body. They are the amino acids you must acquire via food (protein) ingestion.