Question

How are signal molecule levels in blood regulated?

		By rapidly inactivating circulating signal molecule
		By keeping the signal molecule’s concentration constant by maintaining the rate of the molecule’s synthesis equal to the rate of its degradation
		By changing the rate of the signal molecule’s release from storage, transport, and conversion from inactive to active form
		All of the above are correct
		a and c are correct

Answer 1

Signalling molecules are the type of molecules that are needed for trasmitting signals or information between cells in the body. To regulate their levels in the blood, their concentration can be kept constant by maintaining an equal rate of their synthesis and degradation. In cases, the concentration of signalling molecules goes beyond the set limit, their synthesis can be inactivated rapidly too. Both the statements (a) and (c) are correct.

Hence, the correct option is (e)

About the incorrect options-

(a) and (c) are correct individually, but there is a option for both of these.

(b) If signalling molecules are converted from inactive to active form, the concentration will only increase; it will not be regulated.

(d) All options are not correct. (b) is incorrect option.

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