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JEE Main Amines and Biomolecules — practice questions

Explore 13 free Amines and Biomolecules questions in JEE Main Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Amines and Biomolecules questions and exercises with answers

Showing questions 1–13 of 13.

Polythene is best classified as an:Read the answer and worked solution →The disease scurvy results from deficiency of:Read the answer and worked solution →In DNA, the complementary base pair to adenine (A) is:Read the answer and worked solution →Complete the definition of an amino acidRead the answer and worked solution →True or false: amino acidsRead the answer and worked solution →Reading the definitionsRead the answer and worked solution →Which part of the amino acid?Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Polythene is best classified as an:Read the answer and worked solution →The disease scurvy results from deficiency of:Read the answer and worked solution →In DNA, the complementary base pair to adenine (A) is:Read the answer and worked solution →

Worked practice questions

Polythene is best classified as an:

  1. Inorganic polymer of a silicon backbone for industry
  2. Addition polymer of ethene monomers via C=C linkage
  3. Condensation polymer of ethanol with ethane backbone
  4. Natural polymer found in the bark of certain Kerala trees
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Correct answer: B. Addition polymer of ethene monomers via C=C linkage

Polythene is formed by addition polymerisation of ethene (CH$_2$=CH$_2$) into (CH$_2$CH$_2$)$_n$.

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The disease scurvy results from deficiency of:

  1. Vitamin C, found in citrus fruits like orange and lemon
  2. Vitamin D, the bone vitamin produced under sunlight too
  3. Vitamin B12, important for red blood cells in the body
  4. Vitamin A, the vitamin for vision in dim light conditions
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Correct answer: A. Vitamin C, found in citrus fruits like orange and lemon

Scurvy is due to vitamin C (ascorbic acid) deficiency classic in sailors before they ate citrus.

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In DNA, the complementary base pair to adenine (A) is:

  1. Guanine (G), paired with the bigger purine base on chain
  2. Cytosine (C), the other pyrimidine in the helix structure
  3. Uracil (U), the base used only in DNA double helix
  4. Thymine (T), via two hydrogen bonds in DNA double helix
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Correct answer: D. Thymine (T), via two hydrogen bonds in DNA double helix

**In DNA:** A-T pair via 2 H-bonds; G-C pair via 3 H-bonds. (U replaces T in RNA only.)

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More Chemistry topics

Aldehydes, Ketones and Carboxylic AcidsElectrochemistryStructure of AtomThe d- and f-Block Elements & Coordination CompoundsSolutionsRedox ReactionsUnit 2B1: Transition Metals & Coordination CompoundsChemical Kinetics