Back to Practice
AIPMT PRELIMS2004Chemistry-Biomolecules

AIPMT PRELIMS 2004 Chemistry Proteins MCQ Question

Type: MCQ-conceptual-Medium-Class 12

Which one of the following structures represents the peptide chain :-

A

−N∣H−C∣∣O−C∣∣−C∣∣−C∣∣−N∣H−C∣∣−C∣∣−C∣∣−-\overset{\text{H}}{\underset{|}{\text{N}}} - \underset{\substack{|| \\ \text{O}}}{\text{C}} - \overset{|}{\underset{|}{\text{C}}} - \overset{|}{\underset{|}{\text{C}}} - \overset{|}{\underset{|}{\text{C}}} - \overset{\text{H}}{\underset{|}{\text{N}}} - \overset{|}{\underset{|}{\text{C}}} - \overset{|}{\underset{|}{\text{C}}} - \overset{|}{\underset{|}{\text{C}}}-

B

−N∣H−C∣∣−C∣∣O−N∣H−C∣∣−C∣∣O−N∣H−C∣∣−CO∣∣−-\overset{\text{H}}{\underset{|}{\text{N}}} - \overset{|}{\underset{|}{\text{C}}} - \underset{\substack{|| \\ \text{O}}}{\text{C}} - \overset{\text{H}}{\underset{|}{\text{N}}} - \overset{|}{\underset{|}{\text{C}}} - \underset{\substack{|| \\ \text{O}}}{\text{C}} - \overset{\text{H}}{\underset{|}{\text{N}}} - \overset{|}{\underset{|}{\text{C}}} - \overset{\substack{\text{O} \\ ||}}{\text{C}}-

C

−N∣H−C∣∣−CO∣∣−NH∣−C∣∣−N∣H−C∣∣O−C∣∣−C∣∣−-\overset{\text{H}}{\underset{|}{\text{N}}} - \overset{|}{\underset{|}{\text{C}}} - \overset{\substack{\text{O} \\ ||}}{\text{C}} - \overset{|}{\underset{\text{H}}{\text{N}}} - \overset{|}{\underset{|}{\text{C}}} - \overset{\text{H}}{\underset{|}{\text{N}}} - \underset{\substack{|| \\ \text{O}}}{\text{C}} - \overset{|}{\underset{|}{\text{C}}} - \overset{|}{\underset{|}{\text{C}}}-

D

−N∣H−C∣∣O−NH∣−C∣∣−NH−CO∣∣−NH−-\overset{\text{H}}{\underset{|}{\text{N}}} - \underset{\substack{|| \\ \text{O}}}{\text{C}} - \overset{|}{\underset{\text{H}}{\text{N}}} - \overset{|}{\underset{|}{\text{C}}} - \text{NH} - \overset{\substack{\text{O} \\ ||}}{\text{C}} - \text{NH}-

Correct Answer

Option B

Detailed Explanation

A peptide chain is characterized by the presence of amide bonds (–CONH–) linking amino acids. Structure (3) shows this linkage.

Found an issue with this question?

Explore More Questions

All Chemistry QuestionsBiomolecules QuestionsAIPMT PRELIMS 2004 PYQ