Chapter 23, Problem 28R

To determine

To complete: The given sentence.

Explanation of Solution

Introduction:

Amino acids are formed by carbon, hydrogen, nitrogen and oxygen atoms combined together.

When a - ${\text{NH}}_2$ group takes the place of a hydrogen atom in a hydrocarbon, an amine is formed.- ${\text{NH}}_2$ and -COOH groups together form amino acids. Proteins are formed when amino acids are linked through peptide bonds. Fifty or more amino acids linked together through peptide bonds to form proteins.

Conclusion:

Proteins are formed when amino acids combine together.