Final answer:
Cholesterol is a vital component of cell membranes and provides rigidity to them. It is also used to synthesize many reproductive hormones and is involved in processes like emulsification of fats and cellular recognition.
Step-by-step explanation:
Cholesterol is a vital component of cell membranes and provides rigidity to them. It is also used to synthesize many reproductive hormones, such as testosterone and estradiol, and is a precursor to Vitamin D. Cholesterol is necessary for proper functioning of the body and is involved in processes like emulsification of fats and cellular recognition.