Which of the following activities would lead to a decrease in the level of IP₃ in the cytosol? A)increased activity of inositol polyphosphate 5-phosphatase B)increased activity of phospholipase C C)increased activation of protein kinase C D)increased Ca²⁺concentration E)all of the above

Question

Quizplus · Accepted Answer

Inositol polyphosphate 5-phosphatase is responsible for the dephosphorylation of inositol polyphosphate, including IP₃. Therefore, an increase in its activity would result in a decrease in the level of IP₃ in the cytosol. The other options, such as increased activity of phospholipase C, increased activation of protein kinase C, or increased Ca²⁺ concentration, do not directly affect the level of IP₃ in the cytosol.

Which of the Following Activities Would Lead to a Decrease