MDCAT Biology MCQ #459

During dawn and dusk, the rate of carbon dioxide utilization in photosynthesis becomes equal to the rate of carbon dioxide release in respiration. This state is called:

MDCAT Biology MCQ #459

  1. Question 1

    Q1. During dawn and dusk, the rate of carbon dioxide utilization in photosynthesis becomes equal to the rate of carbon dioxide release in respiration. This state is called:

    • A) Saturation point
    • B) Compensation point
    • C) Photochemical equilibrium
    • D) Critical day length

    Answer: Compensation point

    Explanation: Compensation point occurs when gas exchange rates balance; saturation point is the light intensity where photosynthesis rate plateaus.