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8C revision
By Katie Bruce
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Last updated 5 months ago
30 questions
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Question 1
1.
Which of the following is the correct word equation for aerobic respiration?
Glucose + Oxygen → Carbon Dioxide + Water
Glucose + Carbon Dioxide → Oxygen + Water
Oxygen + Water → Glucose + Carbon Dioxide
Glucose → Lactic Acid + Energy
Question 2
2.
What is the main difference between aerobic and anaerobic respiration?
Aerobic respiration occurs only in plants
Anaerobic respiration take place when there is a lack of oxygen
Anaerobic respiration produces more energy than aerobic respiration
Aerobic respiration does not produce carbon dioxide
Question 3
3.
What is the by-product of anaerobic respiration in animals?
Ethanol
Lactic acid
Oxygen
Carbon dioxide
Question 4
4.
Which of the following is a correct equation for anaerobic respiration in yeast?
Glucose → Carbon Dioxide + Lactic Acid
Glucose + Oxygen → Carbon Dioxide + Water
Glucose → Ethanol + Carbon Dioxide
Glucose + Water → Ethanol + Oxygen
Question 5
5.
What happens when too much lactic acid builds up in muscles?
The muscles stop working
Oxygen debt occurs and extra oxygen is needed to break it down
The body stops producing ATP
More glucose is produced
Question 6
6.
Which of the following statements is true?
Aerobic respiration takes place in the heart
Anaerobic respiration happens only in the lungs
Aerobic respiration releases more energy than anaerobic respiration
Anaerobic respiration does not release any energy
Question 7
7.
What is the function of mitochondria in cells?
To store oxygen
To carry oxygen around the body
To release energy through respiration
To remove carbon dioxide
Question 8
8.
What is the main difference between breathing and respiration?
Breathing is a chemical reaction, respiration is a physical process
Respiration is how oxygen is inhaled, breathing is how energy is released
Respiration is a chemical process that releases energy, breathing is the movement of air in and out of the lungs
Breathing happens in mitochondria
Question 9
9.
What happens when you inhale?
The diaphragm moves up and the ribs move in
The diaphragm moves down and the ribs move out
The lungs contract
Carbon dioxide enters the lungs
Question 10
10.
Where does respiration take place in the body?
Only in the lungs
Only in the heart
In all living cells
Only in red blood cells
Question 11
11.
Which gas is removed from the body during exhalation?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
Question 12
12.
Which organ is responsible for breathing?
The heart
The lungs
The stomach
The brain
Question 13
13.
Where does gas exchange occur in human lungs?
Trachea
Alveoli
Bronchi
Diaphragm
Question 14
14.
What gas moves from the alveoli into the blood?
Carbon dioxide
Oxygen
Nitrogen
Hydrogen
Question 15
15.
What feature of alveoli helps gas exchange?
Thick walls
Large surface area
Dry surface
No blood supply
Question 16
16.
How are fish gills adapted for gas exchange?
They have a small surface area
They have thin walls and a rich blood supply
They trap oxygen from the water using mucus
They do not require oxygen
Question 17
17.
What gas do fish absorb from the water through their gills?
Carbon dioxide
Oxygen
Nitrogen
Hydrogen
Question 18
18.
How do plants exchange gases with their environment?
Through the roots
Through the stomata in leaves
By absorbing oxygen from water
By breathing through their stem
Question 19
19.
During photosynthesis, what gas do plants take in?
Oxygen
Carbon dioxide
Hydrogen
Nitrogen
Question 20
20.
What gas do plants release during respiration?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
Question 21
21.
Why do alveoli have thin walls?
To prevent oxygen from escaping
To allow faster diffusion of gases
To support the lungs
To prevent water loss
Question 22
22.
Why do alveoli have a large surface area?
To absorb more oxygen
To store oxygen for later
To prevent infection
To keep the lungs inflated
Question 23
23.
How do fish gills maximise gas exchange?
By using air bubbles
By having many thin filaments with a good blood supply
By using the swim bladder
By trapping oxygen in mucus
Question 24
24.
Why do leaves have stomata?
To absorb nutrients
To let gases in and out
To prevent water loss
To store oxygen
Question 25
25.
How do plants control water loss through their stomata?
By opening them at night
By closing them when it’s hot or dry
By storing water in them
By absorbing water through their stems
Question 26
26.
Why do leaves have a large surface area?
To absorb more light and gases
To trap oxygen
To reduce evaporation
To increase water loss
Question 27
27.
What is the function of guard cells?
To absorb oxygen
To open and close stomata
To store energy
To absorb water
Question 28
28.
How does a moist surface help gas exchange?
It dissolves gases for easier diffusion
It absorbs carbon dioxide
It traps oxygen
It prevents diffusion
Question 29
29.
What happens when there is a high concentration of oxygen in the alveoli?
Oxygen moves into the blood by diffusion
Oxygen moves into the alveoli
Oxygen is converted into carbon dioxide
Oxygen stays in the alveoli
Question 30
30.
Which gas diffuses into the alveoli from the blood to be exhaled?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen