Photosynthesis and Limiting Factors Quiz

Which of the following is NOT a factor affecting the rate of photosynthesis?

• Temperature

• Soil type

• Light intensity

• Carbon dioxide concentration

What role does chlorophyll play in photosynthesis?

• It absorbs water for the plant.

• It absorbs light energy needed for photosynthesis.

• It releases oxygen into the atmosphere.

• It stores glucose produced by the plant.

How does light intensity affect the rate of photosynthesis?

• The rate is not affected by light intensity.

• The rate increases with light intensity up to a certain point.

• The rate remains constant regardless of light intensity.

• The rate decreases as light intensity increases.

What happens to the rate of photosynthesis when carbon dioxide is plentiful?

• It stops completely.

• It plateaus as another factor becomes limiting.

• It continues to increase indefinitely.

• It decreases due to excess carbon dioxide.

At what temperature do enzymes involved in photosynthesis become fully denatured?

• 55°C

• 45°C

• 35°C

• 25°C

In a graph showing two experiments with different temperatures, what indicates the limiting factor?

• The curve with the lower peak indicates the limiting factor.

• The curve with the higher peak indicates the limiting factor.

• The curve with the steeper slope indicates the limiting factor.

• The curve with the flatter slope indicates the limiting factor.

How can farmers increase the temperature for photosynthesis in colder climates?

• By planting more trees

• By increasing water supply

• By using greenhouses

• By using fertilizers

What is a benefit of using a paraffin heater in a greenhouse?

• It increases soil fertility.

• It releases both heat and carbon dioxide.

• It provides additional water.

• It reduces the need for pesticides.

Why might farmers use artificial light in greenhouses?

• To reduce water usage

• To extend the photosynthesis period

• To increase soil nutrients

• To prevent pest infestations

What must farmers consider when deciding to use greenhouses and other technologies?

• The type of soil used

• The number of workers needed

• The extra cost versus the extra yield

• The color of the plants