The enzyme in the mitochondria responsible for the modification of cholesterol that is important to the synthesis of steroid hormones is called
A)Cytochrome P450 enzyme
B)Tyrosine hydroxylase
C)Protein kinase
D)Cholesterol esterase
E)Lipase

Question

Quizplus · Accepted Answer

The Cytochrome P450 enzyme, specifically the CYP11A1 enzyme found in the mitochondria, is responsible for converting cholesterol into pregnenolone, a precursor molecule in the synthesis of steroid hormones such as cortisol, aldosterone, and testosterone. Tyrosine hydroxylase is involved in the synthesis of catecholamines (such as dopamine, norepinephrine, and epinephrine), protein kinase is involved in phosphorylation and signal transduction, cholesterol esterase hydrolyzes ester bonds in cholesterol esters, and lipase breaks down lipids.

The Enzyme in the Mitochondria Responsible for the Modification of Cholesterol