Physiology The enzyme, 5a-reductase is responsible for: A Conversion of cholesterol to pregnenolone and enhancing steroidogenesis B Conversion of testosterone to dihydrotestosterone C Aromatization of testosterone to estradiol D Increasing the synthesis of LH 💡 Explanation The enzyme, 5a-reductase is responsible for: ✓ Correct Answer: B. Conversion of testosterone to dihydrotestosterone