Biology · Principles and Processes in Biotechnology

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Unstained pure DNA fragments cannot be visualized directly in visible light. Reason (R): Ethidium bromide stains DNA fragments, allowing them to emit orange-coloured bands when exposed to UV radiation. In 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
   is false but (R) is true.