Biology for IGCSE & O level - Respiration (Section 2)
1
Which of the following is an example of a process that uses energy produced by aerobic respiration?
Answer
(B)
Cell division
2
Which of the following is correct about the energy released during aerobic respiration?
Answer
(B)
Far more energy is released than in anaerobic respiration.
3
Which of these statements is true regarding anaerobic respiration in yeast?
Answer
(D)
It produces alcohol and carbon dioxide.
4
Which of the following processes is most directly associated with the release of energy in cells?
Answer
(B)
Respiration
5
Which of the following is a product of anaerobic respiration in muscle cells?
Answer
(B)
Lactic acid
6
Which of the following is correct about the energy produced during anaerobic respiration?
Answer
(B)
Small amount
7
In the context of exercise, what does the term 'oxygen debt' primarily refer to?
Answer
(B)
The extra oxygen needed to convert lactic acid back to glucose.
8
Which molecule is produced by anaerobic respiration in muscle cells?
Answer
(C)
Lactic acid
9
What is the name of the process by which energy is used to transport nutrients in the gut?
Answer
(C)
Active transport
10
Which is the starting molecule in aerobic respiration?
Answer
(C)
Glucose
11
What are the products of anaerobic respiration in yeast?
Answer
(B)
Alcohol and carbon dioxide
12
Which statement best describes the energy yield from aerobic respiration?
Answer
(B)
A large amount of ATP.
13
What are the products of aerobic respiration?
Answer
(B)
Carbon dioxide and water
14
Where does glycolysis take place within a cell?
Answer
(B)
Cytoplasm
15
Which molecule is broken down during respiration to release energy?
Answer
(C)
Glucose
16
Which type of respiration occurs in muscles during vigorous exercise when oxygen is limited?
Answer
(C)
Anaerobic respiration
17
How does the amount of energy released by a molecule of glucose during aerobic respiration compare to the amount released during anaerobic respiration?
Answer
(A)
Aerobic respiration releases more energy.
18
What is the purpose of heavy breathing after intense exercise?
Answer
(C)
To replenish oxygen and remove lactic acid.
19
What happens to the heart rate after vigorous exercise?
Answer
(C)
It increases
20
What is the main difference between the energy yield from aerobic respiration and anaerobic respiration?
Answer
(A)
Aerobic respiration produces more ATP.
21
Why does the body need more oxygen after strenuous exercise?
Answer
(A)
To remove lactic acid.
22
During vigorous exercise, what happens in muscle cells if oxygen supply is insufficient?
Answer
(C)
The muscles switch to anaerobic respiration.
23
During strenuous exercise, what is the primary cause of muscle fatigue?
Answer
(B)
Buildup of lactic acid
24
Which process occurs when oxygen is available?
Answer
(C)
Aerobic respiration
25
Where does the Krebs cycle take place?
Answer
(C)
Mitochondrial Matrix
26
What is the role of oxygen in aerobic respiration?
Answer
(B)
It is a reactant in the reaction.
27
What is a common product of anaerobic respiration in yeast?
Answer
(B)
Alcohol
28
In which part of a cell does glycolysis occur?
Answer
(B)
Cytoplasm
29
Which of the following does NOT require energy from respiration?
Answer
(C)
Diffusion across the alveolar wall
30
What is the initial substrate utilized in aerobic respiration?
Answer
(C)
Glucose
31
What happens to the volume and air pressure inside a respirometer when yeast is respiring?
Answer
(B)
Volume decreases; air pressure decreases.
32
Which of the following is the main purpose of the 'oxygen debt'?
Answer
(B)
To convert lactic acid back to glucose
33
Which of the following can respire anaerobically?
Answer
(D)
All of the above.
34
In the investigation of the effect of temperature on yeast respiration, what does the number of bubbles per minute measure?
Answer
(C)
The rate of carbon dioxide production.
35
In the process of respiration, where does the breakdown of glucose begin?
Answer
(B)
Cytoplasm
36
Which process does NOT require energy from respiration?
Answer
(A)
Diffusion of oxygen across the alveolar wall
37
In which of the following does anaerobic respiration occur in humans?
Answer
(C)
Muscle
38
What type of respiration produces the most energy per glucose molecule?
Answer
(C)
Aerobic Respiration
39
Which of the following is most directly involved in converting the energy stored in glucose into a form that cells can use?
Answer
(C)
ATP
40
What is the role of oxygen in aerobic respiration?
Answer
(C)
To combine with hydrogen to form water
41
During aerobic respiration, what happens to the carbon atoms from the glucose molecule?
Answer
(B)
They are released as carbon dioxide.
42
Which of these processes can happen without enzymes?
Answer
(D)
None of the above
43
Which process is essential for the production of ATP in aerobic respiration?
Answer
(C)
Electron transport chain
44
What are the products of anaerobic respiration in muscle cells?
Answer
(B)
Lactic acid
45
What is the end product of anaerobic respiration in human muscle cells?
Answer
(C)
Lactic Acid
46
Which of the following is the main waste product of aerobic respiration?
Answer
(C)
Carbon dioxide
47
What is the main difference in energy yield between aerobic and anaerobic respiration?
Answer
(A)
Aerobic respiration produces more energy per glucose molecule.
48
Which process is represented by the following equation: Glucose -> Lactic acid + energy?
Answer
(C)
Anaerobic respiration in muscle cells
49
Which of the following is a waste product of anaerobic respiration in muscle cells?
