Limiting Factor of Photosynthesis

What is a limiting factor?

• The factor which increases the rate of a reaction
• The factor that determine and limits the reaction rate

• The factor that limits the rate at which an enzyme is destroyed

When it is chilly and raining outside, there is no photosynthesis taking place. What is the limiting factor?

• Temperature
• Rainfall
• Carbon Dioxide

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

• Increases
• Decreases
• Stays the same

If a plant receives less light, what happens to the rate of photosynthesis?

• Increases
• Decreases
• Stays the same

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

• A

• B

• C

• D

Which of these will not affect photosynthesis?

• Light intensity

• Temperature
• Glucose Availability
• Carbon dioxide concentration

Which lettered graph represents the effect of temperature on photosynthetic rate?

• A

• B

• C

• D

How does temperature affects photosynthesis rate?

• As temperature increases, photosynthesis rate also increases.
• As temperature decreases, photosynthesis rate also decreases.
• If the temperature is too high, photosynthesis stops

• All of the statements are true.

The rate of photosynthesis is affected by all of the following except

• the amount of salt

• the availability of water

• light intensity

• temperature

Which conclusion best matches the trends shown on the graph?

• Bean plants produce more ATP than corn plants.
• Corn plants require more oxygen than bean plants.
• Corn plants release more carbon dioxide than bean plants.
• Corn plants produce sugars at a faster rate than bean plants.