Which of the following is an example of a carbohydrate?

Sucrose is a good example of a carbohydrate because it is a disaccharide composed of two monosaccharides: glucose and fructose. Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen, typically with a general formula of (CH₂O)n, where n is the number of carbon atoms. Sucrose serves as a primary source of energy in many organisms and is commonly found in plants, particularly in sugar cane and sugar beets.

Amylase is an enzyme that helps digest carbohydrates but is not classified as a carbohydrate itself. Cholesterol is a type of lipid, which is a different class of biomolecule entirely, important for cell membrane structure and function. Insulin, while crucial in regulating blood sugar levels, is a hormone made of proteins, not carbohydrates. Thus, while all the other options play important roles in biological processes, sucrose is unequivocally the carbohydrate among them.