Q.

Which one of the following is a carbohydrate?

A. Urea
B. Insulin
C. Glycine
D. Glucose
Answer» D. Glucose
Explanation: Glucose, also called dextrose, is one of a group of carbohydrates known as simple sugars (monosaccharides). It is found in fruits and honey and is the major free sugar circulating in the blood of higher animals. It is the most important source of energy for cellular respiration. Glucose is stored as a polymer, in plants as starch and in animals as glycogen.
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