Chapter 21, Problem 5A

Interpretation Introduction

Interpretation:

The general formula of an alpha-amino acid and common structure in all alpha-amino acid needs to be determined.

Concept introduction:

Proteins are macromolecule they are composed of the amino acid. These amino acids are attached linearly to form long linear chains called polypeptides, which create a specific three-dimensional shape. Proteins have different shapes according to there amino acid sequence.

The amino acid is consist of carboxylic acid and amine group and attached with a side chain as R group. Each amino acid contains a central carbon atom, termed as alpha carbon where the amino and carboxylic, R groups are attached.

Answer to Problem 5A

The general structure for an alpha-amino acid is given as-

The general structure of an alpha-amino acid is composed of an alpha carbon at the central portion and at least one carboxylic group and one amine group and attached side chain.

Explanation of Solution

The general structure of an alpha-amino acid is given as -

The central carbon is representing the alpha carbon and one amine group, carboxylic group and R is the side chain.

In all alpha-amino acids the common structure is alpha carbon attached with the amine, carboxylic group, and side-chain R varies.

Conclusion

The central carbon is alpha carbon attached to four different groups. The common structure in all alpha-amino acids is central carbon and amine, carboxylic group.