How does the concentration of carbon dioxide affect the rate of photosynthesis?

Practice Questions

Q1
How does the concentration of carbon dioxide affect the rate of photosynthesis?
  1. Increases rate
  2. Decreases rate
  3. No effect
  4. Only affects light reactions

Questions & Step-by-Step Solutions

How does the concentration of carbon dioxide affect the rate of photosynthesis?
Correct Answer: Increasing carbon dioxide concentration increases photosynthesis rate.
  • Step 1: Understand that photosynthesis is the process plants use to make food using sunlight, water, and carbon dioxide.
  • Step 2: Know that carbon dioxide (CO2) is one of the key ingredients for photosynthesis.
  • Step 3: Realize that when the concentration of carbon dioxide increases, plants have more of this ingredient available.
  • Step 4: Recognize that with more carbon dioxide, plants can produce more food (glucose) through photosynthesis.
  • Step 5: Remember that this increase in the rate of photosynthesis continues until the plants reach a maximum level, where other factors (like light or water) may limit the process.
  • Photosynthesis – The process by which green plants and some other organisms use sunlight to synthesize foods with the help of carbon dioxide and water.
  • Carbon Dioxide Concentration – The amount of carbon dioxide present in the environment, which can influence the rate of photosynthesis.
  • Limiting Factors – Factors that can limit the rate of photosynthesis, including light intensity, temperature, and carbon dioxide concentration.
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