Which of the following elements inhibits the | vedclass

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Question

(D) Sulphydryl enzymes contain $-SH$ groups at their active sites,which are essential for their catalytic activity.Heavy metals like lead $(Pb^{2+})$

Vedclass · Accepted Answer

$Pb$

Vedclass · Answer

(D) Sulphydryl enzymes contain $-SH$ groups at their active sites,which are essential for their catalytic activity.Heavy metals like lead $(Pb^{2+})$ have a high affinity for these sulphydryl $(-SH)$ groups.When lead binds to these groups,it forms stable mercaptides,which block the active site and inhibit the enzyme's function.Therefore,$Pb$ is a known inhibitor of sulphydryl enzymes.

$(a)$ Iron	$(i)$ Photolysis of water
$(b)$ Zinc	$(ii)$ Pollen germination
$(c)$ Boron	$(iii)$ Required for chlorophyll biosynthesis
$(d)$ Manganese	$(iv)$ $IAA$ biosynthesis

Which of the following elements inhibits the activity of sulphydryl enzymes?

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