Practice 8.2 Cell respiration with authentic IB Biology exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like cell biology, genetics, and ecology. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Paper
Level
Question 1
HLPaper 2
The image shows part of a plant cell with a chloroplast in close proximity to mitochondria.
1.[2]
State two structural similarities between mitochondria and chloroplasts.
2.[2]
Compare and contrast mitochondria and chloroplasts in terms of the substrates they use and the products they produce.
3.[3]
Outline how the compounds produced by chloroplasts are distributed throughout the plant.
Question 2
HLPaper 2
The electron micrograph shows part of a cell including a mitochondrion. 
1.[2]
Outline how the structures labelled X and Y are adapted to carry out the function of the mitochondrion.
2.[4]
Explain how ATP is generated in mitochondria by chemiosmosis.
Question 3
HLPaper 1A
This reaction occurs in mitochondria.
What explains that this reaction enables energy to be converted into a usable form?
Question 4
HLPaper 1A
The electron micrograph shows a section through part of an animal cell.
Which process is occurring on the structures labelled X ?
Question 5
HLPaper 1A
The mitochondrion in the electron micrograph shows some features that make it efficient for its function. Which labelled feature allows a rapid build-up of proton concentration for chemiosmosis?
Question 6
HLPaper 1A
Which process requires oxygen in aerobic cell respiration?
Question 7
SLPaper 2
1.[6]
Draw and label a diagram of the carbon cycle.
2.[4]
Outline the effect of carbon dioxide concentration on the rate of photosynthesis and how this can be measured by carbon dioxide uptake.
3.[5]
Explain how carbon dioxide is produced in anaerobic and in aerobic respiration.
Question 8
HLPaper 1A
Where are protons pumped, to allow chemiosmosis in aerobic respiration to occur?
Question 9
HLPaper 2
1.[8]
Explain the reactions that occur in the matrix of the mitochondrion that are part of aerobic respiration.
2.[4]
Outline the differences between aerobic and anaerobic respiration.
3.[5]
The process of respiration involves many enzyme catalysed reactions. Describe what would happen to these enzymes if they were exposed to increasing temperatures.
Question 10
HLPaper 1A
During which process are oxygen molecules directly involved during cellular respiration?