Question

select the true statements.
a peptide bond links amino acids together.
a peptide has one amino acid.
a peptide has carbon, nitrogen, oxygen, and hydrogen atoms.
two amino groups combine to make a peptide bond.

Explanation:

• A peptide bond is indeed what links amino acids together. This is a fundamental concept in biochemistry related to protein structure.
• A peptide is composed of multiple amino acids (at least two). So the statement "A peptide has one amino acid" is false.
• Looking at the general structure of a peptide (as shown in the given formula with elements like \(C\), \(N\), \(O\), \(H\) etc.), a peptide has carbon, nitrogen, oxygen, and hydrogen atoms.
• A peptide bond is formed when the carboxyl group (\(-COOH\)) of one amino acid reacts with the amino group (\(-NH_2\)) of another amino acid (not two amino groups). So the statement "Two amino groups combine to make a peptide bond" is false.

Answer:

A. A peptide bond links amino acids together.
C. A peptide has carbon, nitrogen, oxygen, and hydrogen atoms.