Multiple choice

Assertion: Zinc-finger nucleases (ZFNs) are artificial restriction enzymes. Reason: The DNA-binding domains of individual ZFNs are typically contained between nine and eighteen individual zinc finger repeats.

Directions: In the following question, there are two statements, Assertion (A) and Reason (R). Consider both the statements independently and mark your answer as under:

1. A and R both are correct and R is the correct explanation of A.
2. A and R both are correct and R is not the correct explanation of A.
3. A is correct and R is incorrect.
4. A is incorrect and R is correct.
5. A and R both are incorrect.

  1. (1)

  2. (2)

  3. (3)

  4. (4)

  5. (5)

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Zinc-finger nucleases are artificial restriction enzymes obtained by fusing a zinc finger DNA-binding domain to a DNA-cleavage domain. The DNA-binding domains of individual ZFNs are typically contained between three and six individual zinc finger repeats and can each recognise between 9 and 18 base pairs.