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): The core of eukaryotic cilia and flagella, called the axoneme, possesses a 9+2 arrangement of microtubules. Reason (R): The axoneme emerges from centriole-like structures called basal bodies, which also possess a 9+2 arrangement of microtubules. In the light of the above statements, choose the corr
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
C. (A) is true but (R) is false
Step-by-step solution
Assertion (A) is true: The core of eukaryotic cilia and flagella is called the axoneme. It possesses a number of microtubules running parallel to the long axis. The axoneme usually has nine pairs of doublets of radially arranged peripheral microtubules, and a pair of centrally located microtubules. Such an arrangement of axonemal microtubules is referred to as the 9+2 array. Reason (R) is false: Both the cilium and flagellum emerge from centriole-like structures called the basal bodies. Centrioles (and therefore ba