Photosynthesis

Question 1

What is photosynthesis?

Answer 1

Process used by green plants to produce sugar (glucose)

Question 2

Where does photosynthesis occur?

Answer 2

Chloroplasts

Question 3

What makes the plants green?

Answer 3

Chlorophyll in chloroplasts

Question 4

What are the stages of photosynthesis controlled by?

Answer 4

Enzymes

Question 5

What is stage 1 of photosynthesis called?

Answer 5

Light reactions

Question 6

What is stage 2 of photosynthesis called?

Answer 6

Carbon fixation

Question 7

What happens during stage 1 - light reactions?

Answer 7

• Light energy is absorbed by chlorophyll and converted into chemical energy
• Chemical energy is used to split water into hydrogen and oxygen, and produce ATP
• Oxygen will diffuse out of cell, and hydrogen and ATP will move to stage 2

Question 8

What happens during stage 2 - carbon fixation?

Answer 8

• Hydrogen (from light reactions) and carbon dioxide combine to form glucose
• Carbon fixation also requires ATP (from light reactions)

Question 9

Photosynthesis word equation

Answer 9

Water + carbon dioxide >light energy> glucose + oxygen

Question 10

What is the glucose produced in photosynthesis used for?

Answer 10

Starch
Energy
Cellulose

Question 11

What can a limiting factor to to the rate of photosynthesis?

Answer 11

Reduce it

Question 12

What are 3 limiting factors?

Answer 12

Light intensity
Temperature
Carbon dioxide concentration