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Biomolecules

JEE Main 2025 (Online) 24th January Evening ShiftMatchingEasy📈 Topic in 11% papers+4−1
Ques. 1JEE Main 2025, 24 January (Evening Shift)

Match List - I with List - II. Choose the correct answer from the options given below :

  1. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
  2. (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
  3. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
  4. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

Answer

(2) (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

Solution

Two fused rings with -NH2 adenine (III)

One ring with -NH2 cytosine (IV); with -CH3 thymine (II)

No -CH3, no -NH2 uracil (I)

Answer: (2)

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Ques. 2JEE Main 2025, 23 January (Morning Shift)

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
Ques. 3JEE Main 2025, 23 January (Evening Shift)

The -Helix and - Pleated sheet structures of protein are associated with its :

  1. tertiary structure
  2. quaternary structure
  3. primary structure
  4. secondary structure
Ques. 4JEE Main 2025, 22 January (Morning Shift)

Which of the following acids is a vitamin ?

  1. Saccharic acid
  2. Ascorbic acid
  3. Aspartic acid
  4. Adipic acid
Ques. 5JEE Main 2025, 22 January (Evening Shift)

Identify the number of structure/s from the following which can be correlated to D-glyceraldehyde. [figure]

  1. three
  2. two
  3. one
  4. four

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All JEE Main Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolutionsElectrochemistryChemical Kinetics
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular Structurep-Block Elements (Group 13 & 14)p-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPrinciples Related to Practical Chemistry