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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 fragments stained with ethidium bromide can be directly visualised in normal daylight.\n Reason (R): Ethidium bromide emits bright orange light under visible daylight without needing ultraviolet radiation. \nIn the light of the above statements, choose the correct answer from the options given below:

  1. A
    Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. B
    Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
  3. C
    is true but (R) is false.
  4. D
    Both (A) and (R) are false.
View Answer & Solution

Correct answer · Option D

Both (A) and (R) are false.

Explanation

Both statements are false. DNA fragments cannot be seen in daylight or without staining; bright orange bands are visible ONLY when ethidium bromide stained gel is exposed to UV light.
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