Success is the sum of small efforts repeated day in and day out.— Robert Collier

General Science — quick quiz

5 real UPSC Prelims questions on General Science. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

HARD

With reference to CRISPR-Cas9 gene-editing technology, consider the following statements: 1. CRISPR-Cas9 uses guide RNA to direct the Cas9 enzyme to specific DNA sequences for cutting. 2. The technology can only add new genes but cannot delete or modify existing genes. 3. Off-target effects, where unintended DNA sequences are edited, remain a concern in CRISPR applications. Which of the statements given above is/are correct?