Question

1. choose the best answer.

amino acids are bonded together by _____ bonds.
peptide
neaptide
weak
triple

1. choose the best answer.

there are _____ different amino acids that can make up a protein.
4
100
15
20

Explanation:

Question 3

Amino acids are linked by peptide bonds to form polypeptides (proteins). "Neaptide" is not a valid bond type, "weak" is too vague (peptide bonds are covalent, a type of strong bond in this context), and "triple" bonds are typical of carbon - nitrogen in other contexts, not amino acid linkage.

In biological systems, there are 20 different amino acids that are used to make up proteins. 4 is incorrect (related to nucleotide bases), 100 and 15 do not match the known number of protein - forming amino acids.

Answer:

A. peptide

Question 4