The peptide linkage is:
Correct answer: C. -CONH
- A. CONH2
- B. -COONH2
- C. -CONH
- D. -CH-NH
Explanation
The peptide bond is a covalent linkage formed between the carboxyl group of one amino acid and the amino group of another amino acid. This reaction releases a molecule of water (H2O) and results in the formation of a -CONH- linkage, which is characteristic of peptide bonds. Option C is correct because it accurately depicts the structure of a peptide bond. Option A is incorrect because CONH2 is an amide group but not a peptide bond. Option B is incorrect as -COONH2 is not a valid structural representation of a peptide bond. Option D is incorrect because -CH-NH lacks the necessary carbonyl group present in peptides.
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