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. 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.