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Biology · Principles and Processes in Biotechnology

हिन्दी

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).\n Assertion (A): DNA cannot easily pass across the lipid bilayer membrane of a bacterial cell without special chemical or physical treatment.\n Reason (R): DNA is a hydrophobic polymer with non-polar nitrogenous bases on its exterior. \nIn the light of the above statements, choose the correct answer from the options given below:

  1. Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
  3. is true but (R) is false.
  4. is false but (R) is true.

Correct answer · Option 3

is true but (R) is false.

Explanation

Assertion is true because DNA is hydrophilic (polar, negatively charged), not hydrophobic, which is why it cannot easily pass through hydrophobic lipid membranes.
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