Multiple choice

Peptide bond is formed between

  1. two amino groups

  2. carboxyl group and ketone group

  3. amino group and carboxyl group

  4. two carboxyl groups

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A peptide bond forms through a condensation reaction between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid, releasing a water molecule. This is the fundamental bond that links amino acids together in proteins.