AQA GCSE Biology : bioenergetics
What are the products of photosynthesis ?
oxygen and glucose
How does water enter a plant ?
root hair cells
What is an endothermic reaction?
A reaction that takes in energy from the surroundings
What is used for glucose in plants ?
- for respiration
- to make starch
- to make cellulose
In the required practical way to investigate how light intensity affects photosynthesis, what would
you expect to happen as the distance between the lamp and the plant is increased?
less oxygen is produced
The practical involves the measurement of oxygen bubbles in the water. Through which part of
the plant is oxygen released?
the stomata
If a 6 cm bubble of oxygen is obtained over 5 minutes, what is the rate of reaction?
1.2 cm/minute
The rate of reaction is 1.2 cm/minute (since 6/5 = 1.2).
What are the limiting factors of photosynthesis ?
- light
- chlorophyll
- carbon dioxide
, Which of the following describes a plant that has been attacked by the tobacco mosaic virus?
mottled mosaic of yellow patches on its leaves. This is because the virus destroys the
chloroplasts that give plants their green colour.
As the concentration of CO2 increases, the rate of photosynthesis will also increase until it
reaches a peak and then plateaus. At this peak, the CO2 is said to be at:
optimum concentration
What happens to the rate of photosynthesis when the temperature is increased?
The rate of photosynthesis increases with temperature up to an optimum. As the temperature
continues to rise, the rate of photosynthesis starts to fall rapidly
Why does the rate of photosynthesis start to decrease as the temperature increases above
optimum?
The enzymes controlling photosynthesis are denatured
AD
What is respiration ?
transfer of energy from glucose and it occurs in every cell.
Which processes require energy from respiration ?
- Muscle contraction
- Building proteins from amino acids
- Moving minerals into cells in plants
What type of reaction is respiration ?
exothermic
What is the word equation for aerobic respiration ?
Glucose + oxygen → carbon dioxide + water (+ energy)
Does aerobic respiration transfer more energy than anaerobic respiration ?
YES
What are the products of photosynthesis ?
oxygen and glucose
How does water enter a plant ?
root hair cells
What is an endothermic reaction?
A reaction that takes in energy from the surroundings
What is used for glucose in plants ?
- for respiration
- to make starch
- to make cellulose
In the required practical way to investigate how light intensity affects photosynthesis, what would
you expect to happen as the distance between the lamp and the plant is increased?
less oxygen is produced
The practical involves the measurement of oxygen bubbles in the water. Through which part of
the plant is oxygen released?
the stomata
If a 6 cm bubble of oxygen is obtained over 5 minutes, what is the rate of reaction?
1.2 cm/minute
The rate of reaction is 1.2 cm/minute (since 6/5 = 1.2).
What are the limiting factors of photosynthesis ?
- light
- chlorophyll
- carbon dioxide
, Which of the following describes a plant that has been attacked by the tobacco mosaic virus?
mottled mosaic of yellow patches on its leaves. This is because the virus destroys the
chloroplasts that give plants their green colour.
As the concentration of CO2 increases, the rate of photosynthesis will also increase until it
reaches a peak and then plateaus. At this peak, the CO2 is said to be at:
optimum concentration
What happens to the rate of photosynthesis when the temperature is increased?
The rate of photosynthesis increases with temperature up to an optimum. As the temperature
continues to rise, the rate of photosynthesis starts to fall rapidly
Why does the rate of photosynthesis start to decrease as the temperature increases above
optimum?
The enzymes controlling photosynthesis are denatured
AD
What is respiration ?
transfer of energy from glucose and it occurs in every cell.
Which processes require energy from respiration ?
- Muscle contraction
- Building proteins from amino acids
- Moving minerals into cells in plants
What type of reaction is respiration ?
exothermic
What is the word equation for aerobic respiration ?
Glucose + oxygen → carbon dioxide + water (+ energy)
Does aerobic respiration transfer more energy than anaerobic respiration ?
YES
