Assertion (A) : Replication of DNA during cell cycle occur in S-phage of interphase.
Reason (R) : Centriole duplication occurs in nucleus during S-phase of interphase.
In the light of the above statements, choose the most appropriate answer from the options given below :

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

(A) is correct but (R) is not correct

If (A) & (R) both are correct and (R) is the correct explanation of (A).

If (A) & (R) both are correct but (R) is not the correct explanation of (A).

(A) is not correct but (R) is correct.

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Assertion (A) is correct. DNA replication occurs during the S-phase of interphase, which precedes cell division. It is during this phase that the cell's DNA is duplicated to ensure each daughter cell receives a complete set of genetic material.

Reason (R) is incorrect. Centrioles are small, cylindrical organelles found in animal cells, usually located near the nucleus in the centrosome. However, centriole duplication does not occur in the nucleus; instead, it occurs in the cytoplasm, adjacent to the pre-existing centrioles. The duplication of centrioles occurs during the S-phase of interphase, but it is not within the nucleus.

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th