Peptide Bonds in Protein Structure — NEET Biology
✅ Asked in NEET 2023Q29. Match List – I with List – IIList I (Biomolecule) A. Protein B. Unsaturated fatty acid C. Nucleic acid D. Polysaccharide List II (Bond type) I. C=C double bonds II. Phosphodiester bond III. Glycosidic bonds IV. Peptide bonds Choose the correct answer:
Q29. Match List – I with List – IIList I (Biomolecule) A. Protein B. Unsaturated fatty acid C. Nucleic acid D. Polysaccharide List II (Bond type) I. C=C double bonds II. Phosphodiester bond III. Glycosidic bonds IV. Peptide bonds Choose the correct answer:
Primary proteins are also called as polypeptides because: (NEET 2022 Phase 2)
Match List-I with List-II: (NEET 2021) List-I (a) Protein (b) Unsaturated fatty acid (c) Nucleic acid (d) Polysaccharides List-II I. C=C double bonds II. Phosphodiester bonds III. Glycosidic bonds IV. Peptide bonds Choose the correct answer:
Answer & NCERT explanation
Correct answer: A — A–IV, B–I, C–II, D–III
Proteins have peptide bonds between amino acids. Unsaturated fatty acids contain C=C double bonds. Nucleic acids have phosphodiester bonds linking nucleotides. Polysaccharides have glycosidic bonds between sugar units. These are the characteristic chemical bonds defining each biomolecule class structure and properties.
Read more NCERT concept on the PYQ
Proteins are polypeptides. They are linear chains of amino acids linked by peptide bonds
NTA tests whether students understand that proteins are polypeptides formed by linking amino acids through peptide bonds. Many students confuse peptide bonds with hydrogen bonds or ionic bonds, or forget that peptide bonds are covalent bonds specifically formed between the carboxyl group of one amino acid and the amino group of the next. The key point to remember: a peptide bond is a covalent bond created during a condensation reaction (dehydration synthesis) that connects the -COOH of one amino acid to the -NH₂ of another. This concept appeared in 2021, 2022, and 2023 NEET papers and tests both structure knowledge and understanding of chemical bonding in biomolecules.
What does NCERT say about Proteins are polypeptides They?
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Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
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