UPSC Previous Year Question | Prelims GS | 2019

What is Cas9 protein that is often mentioned in news?

  1. A molecular scissors used in targeted gene editing
  2. A biosensor used in the accurate detection of pathogens in patients
  3. A gene that makes plants pest-resistant
  4. A herbicidal substance synthesized in genetically modified crops

Answer

Correct Answer

A molecular scissors used in targeted gene editing

Explanation

Cas9 is an enzyme guided by RNA in the CRISPR-Cas9 system that cuts DNA at a specific site, acting as 'molecular scissors' for targeted gene editing.

Topics: biotechnology, crispr-cas9, genome editing, science and technology