Question

multiple choice question
at low light intensities, how is the output of photosynthesis related to the intensity of illumination?
the output of photosynthesis decreases exponentially with increases in the intensity of illumination.
the output of photosynthesis increases linearly with increases in the intensity of illumination.
the output of photosynthesis quickly plateaus with increases in the intensity of illumination.

Explanation:

At low light intensities, the rate - limiting factor for photosynthesis is the amount of light available. As the light intensity increases, more light - energy is available for the light - dependent reactions, and the output of photosynthesis (such as the rate of oxygen production or carbon - dioxide fixation) increases linearly because the enzymes and other components involved in photosynthesis are not yet saturated.

Answer:

The output of photosynthesis increases linearly with increases in the intensity of illumination.