Practice 8.3 Photosynthesis 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
SLPaper 1A
Which of the following processes occurs during the light-dependent reactions of photosynthesis?
Question 3
HLPaper 2
1.[4]
Identify four examples of proteins that illustrate the wide range of functions of this group of biochemicals in living organisms.
2.[4]
Describe how the structure of the chloroplast is adapted to its function in photosynthesis.
3.[7]
Explain the role of hydrogen ions used in photosynthesis.
Question 4
HLPaper 1A
What is used to reduce NADP in the light-dependent reactions of photosynthesis?
Question 5
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 6
HLPaper 1A
In the diagram of a chloroplast below where will the Calvin cycle take place?
Question 7
SLPaper 1A
Which of the following is considered an anabolic reaction in cellular metabolism?
Question 8
HLPaper 2
1.[3]
Describe the process of photolysis in photosynthesis.
Question 9
SLPaper 1A
How can the rate of photosynthesis of a plant be directly measured?
Question 10
HLPaper 2
Plants have developed efficient methods for transport and for synthesis of foods.
1.[4]
Compare and contrast between the xylem and phloem of plants.
2.[7]
Explain how the light-independent reactions of photosynthesis rely on the light-dependent reactions.
3.[4]
Outline how the properties of water make it an ideal transport medium in plants.