3. Photosynthesis Flashcards
1
Q
Photosynthesis has two stages
A
Light reactions and carbon fixation
2
Q
Light reactions need
A
Light energy from the sun and water
3
Q
Light energy from the sun is
A
Trapped by chlorophyll and is converted into chemical energy and used to generate ATP
4
Q
Water is
A
Split to produce hydrogen and oxygen
5
Q
Hydrogen
A
Is used in stage 2
6
Q
Oxygen
A
Diffuses out of the cell
7
Q
Carbon fixation needs
A
Hydrogen, ATP and carbon dioxide
8
Q
A series of enzyme controlled reactions produces
A
Sugar
9
Q
Sugar can be used for
A
Respiration (glucose), storage (starch) or structural uses (cellulose)
10
Q
Limiting factors
A
If in short supply will limit the rate of photosynthesis and plant growth
11
Q
Examples of limiting factors
A
Carbon dioxide concentration, light intensity and temperature
