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The diagram below shows a section through a part of a mitochondrion - VCE - SSCE Biology - Question 8 - 2018 - Paper 1
Question 8
The diagram below shows a section through a part of a mitochondrion. The sites of the pathways in aerobic respiration are A. R – glycolysis, S – Krebs cycle, T – e... show full transcript
Worked Solution & Example Answer:The diagram below shows a section through a part of a mitochondrion - VCE - SSCE Biology - Question 8 - 2018 - Paper 1
Step 1
Identify the pathways in aerobic respiration
Answer
In aerobic respiration, the principal pathways are glycolysis, the Krebs cycle, and the electron transport chain. Glycolysis occurs in the cytoplasm, the Krebs cycle occurs in the mitochondrial matrix, and the electron transport chain is located along the inner mitochondrial membrane.
Step 2
Match the letters to the correct sites
Answer
From the diagram:
- R (outside mitochondrion) indicates the site of glycolysis (since it is not inside the mitochondrion),
- S (inside mitochondrion) indicates the site of the Krebs cycle (found in the mitochondrial matrix),
- T indicates the electron transport chain (found along the inner mitochondrial membrane).
Thus, the correct matching indicates option C: R – glycolysis, S – Krebs cycle, T – electron transport chain.