JEE Main · Chemistry ↓ Falling

Biomolecules appeared 36 times across 3 years — 4.2% of Chemistry. This question is from Nucleic Acids.

Year 2026 2025 2024 Total
Questions 9 19 8 36

Two nucleotides are joined together by a linkage known as:

Solution & Explanation

Related Formula

Nucleotides bond phosphodiester linkage:

Nucleotide₁ - O - P(=O)(O^-) - O - Nucleotide₂
Core Logic

Two nucleotides are joined together by phosphodiester linkage between 5' and 3' carbon atoms of the pentose sugar.

Phosphodiester linkage diagram for Q61 - JEE Main 2024 Morning
Phosphodiester linkage diagram for Q61 - JEE Main 2024 Morning

Pattern Recognition

Proteins arrow Peptide, Carbohydrates arrow Glycosidic, Proteins/Cysteine arrow Disulphide, Nucleic Acids arrow Phosphodiester linkage.

Chapter Mix

Class 12 Chemistry: Biomolecules

Phosphodiester linkage diagram for Q61 - JEE Main 2024 Morning
Phosphodiester linkage diagram for Q61 - JEE Main 2024 Morning

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

Rankbit System
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%)