Question

since proteins are needed by the body, all twenty amino acids are considered essential amino acids.
a true
b false

Explanation:

Essential amino acids are those the body can't synthesize and must get from diet, while non - essential amino acids can be made by the body. Out of the 20 standard amino acids, only about 9 are essential (varies slightly by source), not all 20. So the statement is false.

Answer:

B. False