73.磷脂酶 C(phospholipase C)水解磷脂酸肌醇4,5-雙磷酸(phosphatidylinositol 4,5- bisphosphate, PIP 2)後會產生那種第二訊息傳遞物(second messenger)? (A)二酸甘油酯(diacylglycerol, DAG) (B)磷脂酸肌醇(phosphatidylinositol, PI) (C)磷脂酸肌醇1,4,5-三磷酸(phosphatidylinositol 1,4,5-triphosphate, PIP 3) (D)磷酸肌醇(inositol 4,5-bisphosphate, IP 2)