UPSC Prelims 2019·GS1·science-and-technology·ipr and biotechnology

What is Cas9 protein that is often mentioned in news?

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Last updated 23 May 2026, 3:31 pm IST
  1. AA molecular scissors used in targeted gene editingCorrect
  2. BA biosensor used in the accurate detection of pathogens in patients
  3. CA gene that makes plants pest-resistant
  4. DA herbicidal substance synthesized in genetically modified crops

Explanation

Cas9 (CRISPR-associated protein 9) is an enzyme that is a central component of the CRISPR-Cas9 gene-editing system. It is often referred to as 'molecular scissors' or a 'molecular scalpel' because it can be programmed to cut DNA at very specific locations. This precise cutting ability allows scientists to edit genes by either deleting, inserting, or replacing DNA sequences. The CRISPR-Cas9 system has revolutionized genetic engineering due to its precision, efficiency, and relatively ease of use compared to previous gene-editing technologies. Therefore, Cas9 protein is a molecular scissors used in targeted gene editing.
science-and-technology: What is Cas9 protein that is often mentioned in news?

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