S1 Biology - Photosynthesis

What pigment is responsible for absorbing light energy?

• Chlorophyll

• Carotene

• Xanthophyll

• Melanin

Where does photosynthesis occur in plant cells?

• Nucleus

• Mitochondria

• Chloroplast

• Ribosome

Which of the following factors affects the rate of photosynthesis?

• Temperature

• Light intensity

• Carbon dioxide concentration

• All of the above

What happens when light intensity is increased during photosynthesis?

• The rate decreases

• The rate increases

• There is no change

• Oxygen production decreases

What is the effect of high carbon dioxide concentrations on photosynthesis?

• It slows down the process

• It increases the rate

• It has no effect

• It stops the process

How is the rate of photosynthesis typically measured?

• By measuring glucose production

• By measuring oxygen production

• By measuring temperature change

• By counting the number of leaves

What do plants take in through their leaves?

• Minerals

• Light

• Gases

• Water

What do plants take in through their roots?

• Minerals

• Light

• Gases

• Water

Why is photosynthesis important for life on Earth?

• It provides oxygen

• It produces glucose for energy

• It helps regulate temperature

• All of the above

Identify the reactants of photosynthesis.

• Oxygen

• Glucose

• Carbon Dioxide

• Water