Question:medium

Assertion (A): In molecular diagnosis, single-stranded DNA or RNA tagged with radioactive molecule is called a probe.
Reason (R): A probe always searches and hybridizes with its complementary DNA in a clone of cells.

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Probes are key tools in molecular diagnostics for identifying specific genetic sequences.
Updated On: Jan 13, 2026
  • Both (A) and (R) are true and (R) is the correct explanation of (A).
  • Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  • (A) is true, but (R) is false.
  • (A) is false, but (R) is true.
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The Correct Option is A

Solution and Explanation

In molecular diagnostics, a probe is a labeled DNA or RNA strand that identifies specific sequences. It binds to its complementary DNA, indicating that Reason (R) explains Assertion (A).

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