Question 2 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC
Answer:
Lipids (fats) have more carbon bonds than carbohydrates and proteins. This is because energy is stored in chemical bonds, particularly carbon-carbon and carbon-hydrogen bonds. Since lipids provide significantly more energy per gram (9 calories compared to 4 calories), they must contain a higher density of these energy-rich carbon bonds.