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- 1. Multiple Choice
Which of the following shows the balanced chemical symbol equation for photosynthesis?
A
B
C
D
- 2. Multiple Choice
What is the main energy change that happens in photosynthesis?
chemical --> light
light --> kinetic
light --> chemical
kinetic --> light
- 3. Multiple Choice
Where is chlorophyll found in plant cells?
cytoplasm
chloroplast
mitochondria
vacuole
- 4. Multiple Choice
What substance can glucose be converted to, which is the transport carbohydrate of plants?
starch
cellulose
sucrose
amino acids
- 5. Multiple Choice
What substance can glucose be converted into, which is the energy storage carbohydrate of plants?
cellulose
sucrose
amino acids
starch
- 6. Multiple Choice
Which substance can glucose be converted to, which strengthens plant cell walls?
starch
cellulose
amino acids
sucrose
- 7. Multiple Choice
Which of the following organelles would you not expect to be present in onion root cells?
cell wall
vacuole
chloroplast
mitochondrion
- 8. Multiple Choice
All of the definitions below are descriptions of a 'limiting factor'.
Which of these is the IGCSE Biology definition?
a factor in the environment that runs out
something present in the environment in such short supply that it restricts life processes
a factor in the environment that is in short supply
something present in the environment in such short supply that it stops life processes
- 9. Multiple Choice
Click on the picture to make it larger.
Which of the following can you conclude about point X from this graph alone?
I. light intensity limits the rate of photosynthesis
II. as light intensity increases, rate of photosynthesis increases
III. CO2 concentration limits the rate of photosynthesis
I and II only
I and III only
II and III only
I, II and III
- 10. Multiple Choice
Click on the picture to make it larger.
Which of the following can you conclude about point Y from this graph?
I. light intensity does not limit the rate of photosynthesis
II. the plant has stopped photosynthesising
III. the rate of photosynthesis could be limited by a shortage of water or CO2
I and II only
I and III only
II and III only
I, II and III
- 11. Multiple Choice
Click on the picture to make it larger.
What do curves C and D suggest is limiting the rate of photosynthesis?
light intensity
carbon dioxide concentration
temperature
water
- 12. Multiple Choice
Click on the picture to make it larger.
What do curves B and D suggest is limiting the rate of photosynthesis?
light intensity
carbon dioxide concentration
temperature
water
- 13. Multiple Choice
Supplying extra heat and carbon dioxide is more expensive, but may be worth it if the rate of photosynthesis greatly increases.
Click on the graph to make it larger.
Which of the following would it not be worth doing for a plant grower?
increasing the CO2 from 0.03% to 0.1% at a temperature of 20oC.
increasing the CO2 from 0.03% to 0.1% at a temperature of 25oC.
increasing the temperature from 20oC to 25oC at a CO2 concentration of 0.03%
increasing the temperature from 20oC to 25oC at a CO2 concentration of 0.1%
- 14. Multiple Choice
Why is the chemical sodium hydrogencarbonate given to water plants in photosynthesis practicals?
it is used to produce chlorophyll
it allows the plant to respire
it supplies the plant with CO2 gas when it dissolves
it is a source of glucose
- 15. Multiple Choice
All of the statements below are correct definitions of photosynthesis.
Which of these is the IGCSE Biology definition of photosynthesis?
the process that produces glucose and oxygen, using CO2, water, light and chlorophyll
the process that converts light energy into chemical energy
the process by which plants produce carbohydrates from raw materials using light energy
the process that converts inorganic compounds into organic compounds
- 16. Multiple Choice
Four test-tubes are set up as shown.
Click on the picture to make it larger.
Which test-tube contains the most carbon dioxide after one hour?
A
B
C
D
- 17. Multiple Choice
The raw materials of photosynthesis.
CO2 and H2O
CO2 and C6H12O6
O2 and H2O
O2 and C6H12O6
- 18. Multiple Choice
The waste material of photosynthesis.
CO2
H2O
O2
C6H12O6
- 19. Multiple Choice
The diagram shows the apparatus used in the
Ingenhousz experiment which aims to measure the
rate of oxygen produced during photosynthesis.
Which two factors must be kept constant during
this investigation?
The volume of water in the beaker and the height of the measuring cylinder.
The type of aquatic plant and the amount of gas in the measuring cylinder.
The size of the aquatic plant and the duration of exposure to light.
The size and type of aquatic plant and the duration of exposure to light
- 20. Multiple ChoiceWhy do plants conduct photosynthesis?To make lightTo make mitochondriaTo make glucoseTo release carbon dioxide
- Answer choicesTagsAnswer choicesTags