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Biomolecules appeared 36 times across 3 years — 4.2% of Chemistry. This question is from Polymers and Monomers.

Year 2026 2025 2024 Total
Questions 9 19 8 36

Match List I with List II:
List I (Bio Polymer)List II (Monomer)
A. StarchI. nucleotide
B. CelluloseII. α-glucose
C. Nucleic acidIII. β-glucose
D. ProteinIV. α-amino acid
Choose the correct answer from the options given below :

Solution & Explanation

Related Formula

Factual knowledge of biopolymers and their fundamental repeating units (monomers).

Core Logic

Analyzing each polymer component:

  • Starch is a polymer composed entirely of α-glucose units.
  • Cellulose is a linear structural polymer consisting of linear chains of β-glucose units.
  • Nucleic acids (DNA/RNA) are long chains composed of repeating nucleotide units.
  • Proteins are polypeptides made from combined α-amino acid sequences.
Step 1: Final Match Alignment

Matching structural links properly leads cleanly to the configuration: A-II, B-III, C-I, D-IV.

Pattern Recognition

Standard memorization trick: Plants store starch using alpha linkers, but build rigid cell walls via beta linkers.

Chapter Mix

Class 12 Chemistry: Biomolecules

Reference Study Guides

More Biomolecules Previous-Year Questions — Page 8

Q78 jee_main_2024_31_jan_morning Reactions of Glucose
Match List I with List II
LIST-ILIST-II
A. Glucose/NaHCO₃/ΔI. Gluconic acid
B. Glucose/HNO₃II. No reaction
C. Glucose/HI/ΔIII. n-hexane
D. Glucose/Bromine waterIV. Saccharic acid
Choose the correct answer from the options given below:
  • A. A-IV, B-I, C-III, D-II
  • B. A-II, B-IV, C-III, D-I
  • C. A-III, B-II, C-I, D-IV
  • D. A-I, B-IV, C-III, D-II

Solution

Core Logic

Matching the reactions of glucose: (A) Glucose does not react with NaHCO₃, so there is no reaction. (A arrow II) (B) Oxidation of glucose with strong oxidizing agents like HNO₃ yields a dicarboxylic acid called saccharic acid. (B arrow IV) (C) Prolonged heating of glucose with HI forms n-hexane, indicating a straight chain of six carbon atoms. (C arrow III) (D) Oxidation with mild agents like bromine water converts glucose to gluconic acid. (D arrow I)

Chapter Mix

Class 12 Chemistry: Biomolecules

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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)