Required for cell membrane structure and hormone synthesis.

What is the definition of Respiratory Quotient (RQ)? A) The ratio of oxygen consumed to carbon dioxide produced. B) The ratio of carbon dioxide produced to oxygen consumed. C) The amount of ATP produced per gram of protein. D) The rate of breathing during exercise.

Answer: C (Fats provide 9 kcal/g, while carbohydrates and proteins provide 4 kcal/g). A) Glucose B) Sucrose C) Glycogen D) Fructose