Discussion
Allosteric enzymes will have the following property :
Answer: A
Allosteric enzymes show sigmoidal kinetics.
Allosteric enzymes usually have several subunits whose binding sites interact. Binding of substrate at one site raises the affinity of the others (positive cooperativity), so the plot of rate against substrate concentration is S-shaped, and activity switches sharply over a narrow range of substrate.
A rectangular hyperbola is the Michaelis-Menten curve of non-allosteric enzymes. Allosteric activators and inhibitors shift the substrate concentration for half-maximal rate, so the apparent K\(_{m}\) is not fixed. Competitive inhibition can occur with any enzyme and is not a property of allostery.
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