4.1.2 Factors Affecting Photosynthesis

• Higher light intensity increases the rate of photosynthesis.


  True
• Increased temperature up to an optimum increases the rate of photosynthesis
• Why does higher carbon dioxide concentration increase the rate of photosynthesis?

  More raw material available
• Higher light intensity increases the rate of photosynthesis.

  True
• Order the components of the photosynthesis equation:

  1️⃣ 6CO2 + 6H2O

  2️⃣ Light Energy

  3️⃣ C6H12O6 + 6O2
• Photosynthesis is the process by which plants use light energy from the sun to convert carbon dioxide and water into glucose and oxygen
• Match the reactant or product with its role in photosynthesis:

  Carbon Dioxide ↔️ Reactant for glucose

  Glucose ↔️ Provides energy to plant

  Oxygen ↔️ Released as a byproduct

  Light Energy ↔️ Drives the reaction
• Higher light intensity increases the rate of photosynthesis because more light energy
• How does temperature affect the rate of photosynthesis beyond the optimum level?

  Enzymes denature
• Higher concentrations of carbon dioxide increase the rate of photosynthesis because more raw material is available to convert into glucose
• Why does enzyme denaturation reduce the rate of photosynthesis at temperatures above the optimum?

  Changes enzyme structure
• Open stomata allow higher carbon dioxide intake.


  True
• Limiting factors restrict the rate of photosynthesis when they are in short supply
• Photosynthesis is the process by which plants use light energy from the sun to convert carbon dioxide and water into glucose
• What happens to the rate of photosynthesis as carbon dioxide concentration increases?

  Increases
• A lack of water decreases the rate of photosynthesis.


  True
• Increased temperature beyond the optimum can start to decrease the rate of photosynthesis
• What happens to the rate of photosynthesis as carbon dioxide concentration decreases?

  Decreases
• Why do enzymes involved in photosynthesis function best within a specific temperature range?

  To prevent denaturation
• Water is one of the reactants in photosynthesis.


  True
• What are the three key factors that affect the rate of photosynthesis?

  Light, CO2, temperature
• Higher concentrations of carbon dioxide decrease the rate of photosynthesis.

  False
• Order the effect of light intensity on the photosynthesis rate from low to high:

  1️⃣ Low light intensity ||| High light intensity
• Lower concentrations of carbon dioxide reduce the rate of photosynthesis.

  True
• Low water availability reduces turgor pressure in guard cells, causing stomata to close
• Which mineral nutrient is essential for chlorophyll production and enzyme activity?

  Nitrogen