Final answer:
LCAT is extracellular and works with triglycerides, while ACAT is intracellular and works with cholesterol.
Step-by-step explanation:
The correct answer is:
d) LCAT: Extracellular, triglycerides; ACAT: Intracellular, cholesterol
LCAT, or Lecithin-Cholesterol Acyltransferase, is an extracellular enzyme that plays a role in cholesterol metabolism. It converts cholesterol into cholesteryl esters by transferring a fatty acid from phosphatidylcholine to cholesterol.
ACAT, or Acyl-CoA Cholesterol Acyltransferase, is an intracellular enzyme that is responsible for esterifying cholesterol to form cholesteryl esters. It is primarily found in the endoplasmic reticulum of cells.