<prompt> Common precursor of mineralocorticoid, glucocorticoids and sex steroids:Pregnenolonea- hydroxyprogesteroneDehydrotesteroneDeoxycorticoid  <response>: Ans. a PregnenoloneRef: Ganong, 25th edp.362Adrenal steroid hormones are derived from cholesterolIn the mitochondria, cholesterol is converted to pregnenolone by cholesterol desmolase, also called as side- chain cleavage enzyme 