Question

cells link specific amino acids together to make a protein. when two amino acids combi they form a peptide. the bond between amino acids in a peptide is called a peptide bo a peptide bond forms when the carboxyl group of one amino acid reacts with the amino group of another amino acid, releasing a molecule of water. the model below shows a reaction between two amino acid molecules. select the true statements. two carboxyl groups combine to make a peptide bond. a peptide forms when two proteins join together. when a peptide bond is formed, water is released.

Explanation:

• For the statement "Two carboxyl groups combine to make a peptide bond": A peptide bond forms between the carboxyl group of one amino acid and the amino group of another amino acid, not two carboxyl groups. So this is false.
• For the statement "A peptide forms when two proteins join together": Peptides are formed from the combination of amino acids, and proteins are made of one or more peptides. So a peptide is not formed by two proteins joining; this is false.
• For the statement "When a peptide bond is formed, water is released": From the reaction shown (and the description), when the carboxyl group of one amino acid reacts with the amino group of another, a water molecule is released. This matches the given model and description, so this is true.

Answer:

The only true statement is: "When a peptide bond is formed, water is released."