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MHT CET Medical202625 April 2026Morning ShiftBiologyMolecular Basis of InheritanceActual

The two strands in a DNA molecule are ________ .

Options

  1. Aparallel and complementary.
  2. Bantiparallel and complementary.
  3. Cparallel and non-complementary.
  4. Danti parallel and non-complementary.

Correct answer

B. antiparallel and complementary.

Step-by-step solution

The two strands of a DNA molecule are antiparallel, meaning one strand runs in the 5' to 3' direction while the other runs in the 3' to 5' direction. They are also complementary, as the nitrogenous bases on one strand pair specifically with bases on the other strand (Adenine pairs with Thymine, and Cytosine pairs with Guanine) through hydrogen bonds. Answer: antiparallel and complementary.

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