Glycol- is a prefix meaning which concept?

• A. Protein
• B. Stomach
• C. Sugar
• D. Gums

Answer: (C)

Glycol- signals sugar or a relation to sugar. It comes from a Greek root meaning sweet, and it shows up in terms describing sugar or sugar-containing processes, such as glycolysis, where sugar is broken down to release energy, or glycolic acid and related compounds. So the best answer is sugar because that prefix is used specifically to refer to sugar in biological and chemical terms. The other options point to different roots (protein, stomach, gums) and don’t align with the meaning of glycol-.