Factors Affecting Rate of Photosynthesis

How would light intensity generally affect the rate of photosynthesis?

• Increases the rate, up to a point
• Increases the rate
• Decreases the rate
• No relationship to the rate

Why would temperature affect the rate of photosynthesis?

• Enzymatic activity is usually temperature dependent
• plant cells expand with temp, have greater surface area
• More CO₂ dissolved in the water
• More glucose needed for respiration at higher temperatures

How would the concentration of CO₂ in water affect photosynthesis?

• The higher the CO₂, the greater the rate
• The higher the CO₂, the lower the rate
• CO₂ concentration doesn't affect photosynthesis
• a greater rate of photosynthesis causes higher CO₂ concentrations 

A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being collected is probably ________.

• oxygen
• carbon dioxide
• ATP
• glucose

Which lettered graph represents the affect of light intensity on photosynthetic rate?

• A

• B

• C

• D

From A to B

• light intensity does not affect the rate of P/S

• as light intensity increases the rate of P/S increases

• as the light intensity increases the rate of P/S decreases

If a plant receives more carbon dioxide, what happens to the rate of photosynthesis?

• Increases
• Decreases
• Stays the same

Which of the following would have affect the rate of photosynthesis?

• amount of water
• carbon dioxide concentration
• temperature
• all of these

How does temperature affects photosynthesis rate?

• As temperature increases, photosynthesis rate also increases.
• As temperature decreases, photosynthesis rate also decreases.
• Plants cannot photosynthesis if the temperature is too cold or too hot. 
• All of the statements are true.