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🧬 Cellular Respiration
•Glycolysis splits glucose into two pyruvate — in the cytoplasm
•The Krebs cycle takes place in the mitochondrial matrix
•The electron transport chain runs along the inner membrane
•Net yield ≈ 30–32 ATP per glucose molecule
🧬 Cellular Respiration
•Glycolysis splits glucose into two pyruvate — in the cytoplasm
•The Krebs cycle takes place in the mitochondrial matrix
•The electron transport chain runs along the inner membrane
•Net yield ≈ 30–32 ATP per glucose molecule
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Why does increasing temperature speed up most chemical reactions?
2 / 3Marks
Particles move faster, so they collide more often and always have enough energy to react.
Marks missed
✕More collisions exceed the activation energy — not all of them. Higher temperature raises the proportion of successful collisions.
Which organelle is responsible for producing most of a eukaryotic cell's ATP?
✕
ARibosomeYour answer
BMitochondrionCorrect answer
Why your answer is wrong
Ribosomes synthesise proteins by translating mRNA — they don't generate energy for the cell.The correct answer
The mitochondrion produces ATP through aerobic respiration; its inner membrane houses the electron transport chain.State why ice is less dense than liquid water.
2 / 2Marks
In ice, hydrogen bonds hold the molecules in a fixed open lattice, so the molecules are spaced further apart than in liquid water.
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