Biochemistry The active transport of ‘Ca’ is regulated by _______ which is synthesized in kidneys: A Cholecalciferol B Ergosterol C 25-OH cholecalciferol D 1, 25-di OH-Cholecalciferol 💡 Explanation The active transport of 'Ca' is regulated by _______ which is synthesized in kidneys: ✓ Correct Answer: D. 1, 25-di OH-Cholecalciferol