Question

select the correct answer
why are certain amino acids called essential amino acids?
a. because they are available in abundance
b. because they are not manufactured by the body
c. because they can form bonds with any molecule
d. because they are the most stable among all the amino acids
e. because they are needed for the formation of all biomolecules

Explanation:

Essential amino acids are defined as amino acids that the human body cannot synthesize on its own in sufficient quantities to meet physiological needs, so they must be obtained through dietary intake. Option A is incorrect as abundance does not define essentiality. Option C is wrong because all amino acids form bonds, not just essential ones. Option D is incorrect as stability is not the defining factor. Option E is false because not all biomolecules require these specific amino acids.

Answer:

B. because they are not manufactured by the body