How does the availability of light affect the rate of photosynthesis?

Practice Questions

Q1
How does the availability of light affect the rate of photosynthesis?
  1. It has no effect
  2. Increases the rate until a saturation point
  3. Decreases the rate
  4. Only affects the dark reactions

Questions & Step-by-Step Solutions

How does the availability of light affect the rate of photosynthesis?
Correct Answer: The rate of photosynthesis increases with light availability until it reaches a saturation point.
  • Step 1: Understand that photosynthesis is the process plants use to make food using sunlight.
  • Step 2: Know that light is one of the key ingredients needed for photosynthesis to happen.
  • Step 3: Realize that when there is more light available, plants can perform photosynthesis faster.
  • Step 4: Observe that as light increases, the rate of photosynthesis also increases.
  • Step 5: Identify that there is a limit to this increase; after a certain point, more light does not make photosynthesis go any faster.
  • Step 6: This limit is called the saturation point, where the plant has enough light to maximize its photosynthesis.
  • Photosynthesis Rate – The process by which plants convert light energy into chemical energy, primarily influenced by light intensity.
  • Light Saturation Point – The level of light intensity at which the rate of photosynthesis no longer increases despite further increases in light availability.
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