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Biomolecules question

2002 · Shift 0 · Q21
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Biomolecules question

2002 · Shift 0 · Q21

JEE MainChemistryBiomoleculesMCQ+4 / −1
RNA is different from DNA because RNA contains
  1. A
    ribose sugar and thymine
  2. B
    ribose sugar and uracil
  3. C
    deoxyribose sugar and thymine
  4. D
    deoxyribose sugar and uracil
View written solutionFree

Correct answer: B

  1. Recall the basic difference between DNA and RNA

    • DNA contains:

      • Deoxyribose sugar
      • Bases: adenine, guanine, cytosine, thymine

    • RNA contains:

      • Ribose sugar
      • Bases: adenine, guanine, cytosine, uracil

  2. Evaluate each option

    A: ribose sugar and thymine

    • RNA does contain ribose sugar, but it does not contain thymine.
    • Hence, A is incorrect.

    B: ribose sugar and uracil

    • RNA contains ribose sugar and uracil.
    • Hence, B is correct.

    C: deoxyribose sugar and thymine

    • This is the composition of DNA, not RNA.
    • Hence, C is incorrect.

    D: deoxyribose sugar and uracil

    • RNA does not contain deoxyribose sugar.
    • Hence, D is incorrect.

  3. Final answer

    RNA is different from DNA because RNA contains ribose sugar and uracil.

    Therefore, the correct option is: B\boxed{\text{B}}B​

  4. Comparison with stored correct answer

    • Stored correct answer: B
    • Derived answer: B

    They match.

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