- A A protein rich in nitrogen
- B A fat such as tripalmitin
- C A carbohydrate such as glucose
- D An organic acid such as oxalic acid
Correct answer: C. A carbohydrate such as glucose
Explanation: Carbohydrate respiration consumes O2 and releases CO2 in equal volumes, giving an RQ of 1, since carbohydrates already contain oxygen in the same ratio needed for complete oxidation.
Concept context
Glycolysis, the Krebs cycle, the electron transport chain, fermentation, and the respiratory quotient. The cellular energy-release counterpart to photosynthesis.