NEETBotanyCell - The Unit of Life
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): An acrocentric chromosome forms one extremely short and one very long arm. Reason (R): The centromere in an acrocentric chromosome is terminal in position. In the light of the above statements, choose the correct answer from the options given below:
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- B(A) is true but (R) is false
- CBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- D(A) is false but (R) is true
Correct answer
B. (A) is true but (R) is false
Step-by-step solution
Assertion (A) is true because in an acrocentric chromosome, the centromere is situated close to its end, which results in the formation of one extremely short and one very long arm. Reason (R) is false because a chromosome with a terminal centromere is called a telocentric chromosome, not an acrocentric chromosome. The centromere in an acrocentric chromosome is sub-terminal (close to its end). Therefore, (A) is true but (R) is false. Answer: (A) is true but (R) is false