Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Biomolecules

Question:

Statement I: \(\alpha\) -amino acids have Zwitter ion structure

Statement II: \(\alpha\) -amino acids on heating form cyclic structure

Options:

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is false

Statement I is false but Statement II is correct

Correct Answer:

Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

Explanation:

The correct answer is (2) Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I.

Statement I: α-amino acids have Zwitter ion structure.

This statement is correct. Zwitterion is a molecule that has both a positive and a negative charge. α-amino acids have a carboxyl group (-COOH) and an amino group (-NH2) on the same carbon atom, which makes them zwitterions.

Statement II: α-amino acids on heating form cyclic structure.

This statement is also correct. α-amino acids can form cyclic structures called peptides when they are heated. Peptides are formed by the reaction of the amino group of one α-amino acid with the carboxyl group of another α-amino acid.

However, Statement II is not the correct explanation of Statement I. The fact that α-amino acids can form cyclic structures does not explain why they have zwitterion structures. The zwitterion structure of α-amino acids is due to the presence of the carboxyl group and the amino group on the same carbon atom.

Therefore, both statements are correct, but Statement II is not the correct explanation of Statement I.