MDCAT Biology MCQ #470

A graph showing the relative effectiveness of different wavelengths of light in driving photosynthesis is properly referred to as the:

MDCAT Biology MCQ #470

  1. Question 1

    Q1. A graph showing the relative effectiveness of different wavelengths of light in driving photosynthesis is properly referred to as the:

    • A) Action spectrum
    • B) Absorption spectrum
    • C) Emission spectrum
    • D) Electromagnetic spectrum

    Answer: Action spectrum

    Explanation: Engelmann used Spirogyra and aerobic bacteria to plot the action spectrum; the absorption spectrum measures pigment light uptake.