Which term is described as the main fuel for cellular work?

Which term is described as the main fuel for cellular work?

• A. Disaccharide
• B. Protein
• C. Polysaccharide
• D. Monosaccharide

Answer: (D)

Monosaccharide. Cells rely on simple sugars, especially glucose, as the immediate fuel for energy production. Glucose can enter glycolysis directly, get split and oxidized to generate ATP through subsequent steps in cellular respiration. Disaccharides and polysaccharides must first be broken down into monosaccharides before they can be used, so they’re not as readily available for quick energy. Proteins can be used for energy only after other roles and additional processing, so they’re not the primary energy source.

Monosaccharide. Cells rely on simple sugars, especially glucose, as the immediate fuel for energy production. Glucose can enter glycolysis directly, get split and oxidized to generate ATP through subsequent steps in cellular respiration. Disaccharides and polysaccharides must first be broken down into monosaccharides before they can be used, so they’re not as readily available for quick energy. Proteins can be used for energy only after other roles and additional processing, so they’re not the primary energy source.