Question

Phosphorylation could activate an allosteric enzyme by _____ the amount of the T-form. Phosphorylation could inhibit a Michaelis-Menten enzyme by ____ the Km of the enzyme for its substrate.
increasing; decreasing
decreasing; decreasing
increasing; increasing
decreasing; increasing

Answer 1

Answer:

Decreasing, Increasing.

Explanation:

Phosphorylation could activate an allosteric enzyme by decreasing the amount of the T-form. In the case of allosteric enzyme phosphorylation results in the form of activation of allosteric enzyme. T-form of the allosteric enzyme is present in the inactivated form, so which is decrease as the enzyme is getting activated.

Michaelis-Menten enzyme by increasing the Km of the enzyme for its substrate. In this case, Michaelis-Menten enzyme phosphorylation is inhibited so that the Km is higher. Which is defined as the affinity of the enzyme for the substrate is low and the enzyme is inhibited.