B2.3 - Photosynthesis Flashcards
1
Q
What is the equation for photosynthesis?
A
Carbon Dioxide + Water —(light energy+chlorophyll)—> Glucose + Oxygen
2
Q
Describe the process of photosynthesis:
A
- light energy is absorbed by a green substance called chlorophyll
- this energy is used by converting carbon dioxide and water (from the soil) into glucose
- oxygen is released as a by-product.
3
Q
What factors can affect the rate of photosynthesis?
A
- light intensity
- temperature
- carbon dioxide concentration
4
Q
How can glucose be stored?
A
When it is turned into insoluble starch by the plant.
5
Q
What do plants use some of the glucose produced by photosynthesis for?
A
- Respiration
- To produce fat or oil for storage
- To produce cellulose to strengthen the cell wall
- To produce protiens
6
Q
What else do plants need to produce proteins?
A
Nitrate ions from the soil.
7
Q
Where do plants get water from?
A
The soil
8
Q
Where do plants get carbon dioxide from?
A
The air
9
Q
What are stomata?
A
Pores in the surface of the leaf which let carbon dioxide in and oxygen out
10
Q
What are the cells called which open and close the stomata?
A
Guard cells.
11
Q
What is the glucose produced by the plant used for?
A
‘Food’ within the plant
