Chapter 24, Problem 6STP

Interpretation Introduction

Interpretation: To give the elements that are not present in amino acid.

Concept introduction:

An amino acid is a compound that consists of two functional groups that are amino group and carboxyl group along with hydrogen and a side group. All these groups are bonded covalently to each other

Answer to Problem 6STP

Correct answer: The element that is not present in an amino acid is phosphorus.

Explanation of Solution

Reason for correct option: Amino acids are the smaller molecules that make up a protein. The molecules of amino acids are composed of carbon, nitrogen, hydrogen, and oxygen. There are $20$ different amino acids that are beneficial in serving the structural units of all proteins.

Every amino acid consists of two functional groups that are amino group and the carboxylic acid group.

When two amino acids combine, they release a water molecule along with the formation of protein via a condensation reaction. The bond that links amino acid units together is known as a peptide bond.

Since an amino acid is composed of all the given elements except phosphorus. Thus, the element that is absent in amino acid is phosphorus.

Conclusion

Reasons for incorrect options: The elements such as carbon, nitrogen, hydrogen, and oxygen make up an amino acid.