Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: The quiescent centre acts as a reservoir of relatively resistant cells which constitute a permanent source of active initials Reason: The cells of the inactive region of quiescent centre become active when the previous active initials get damaged.A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but the Reason is not the correct explanations of Assertion.
C) If Assertion is true, but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: A
Solution :
Quiescent centre was discovered by Clows in roots. It is present between the root cap and active meristematic region. The cells of this region have lower concentrations of DNA, RNA and protein. This is inactive region which acts as a reservoir of relatively resistant cells. It constitutes a permanent source of active initials which became active when the previously active initials are damaged.
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