U3 KA3: Photosynthesis

Question 1

What is photosynthesis?

Answer 1

• the process by which plants take energy from sunlight, and convert it into glucose.

Question 2

What is the role of Chlorphyll in photosynthesis?

Answer 2

• to trap light energy and convert it into chemical energy.

Question 3

What happens in the light reaction stage of photosynthesis?

Answer 3

• light energy is absorbed by chlorophyll around converted into chemical energy used to make ATP.
• some chemical energy is used to split oxygen and hydrogen.
• the oxygen is a by-waste product and diffuses out of the cell.

Question 4

What happens in the Carbon Fixation stage of Photosynthesis?

Answer 4

• enzymes use energy from the ATP made in the light reactions to combine Hydrogen and Carbon Dioxide.
• The product is Glucose.

Question 5

What 3 factors can affect the rate of Photosynthesis?

Answer 5

• Light Intensity
• Co2 concentration
• Temperature

Question 6

What is a limiting factor?

Answer 6

• something that is in short supply and is preventing the rate of photosynthesis from being any higher.