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Cellular Respiration Revision
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Cellular Respiration Revision
Use the information on this worksheet to revise how cells release usable energy. Answer every question; show working where needed.
Part A: Check the essentials
1.A cell needs energy to power processes such as active transport and protein synthesis. What is the main role of cellular respiration?
- To capture light energy and store it as glucose
- To transfer energy from organic molecules into ATP
- To make oxygen for the cell
- To build glucose from carbon dioxide
2.Complete the word equation for aerobic cellular respiration: glucose + → carbon dioxide + water + energy transferred to .
3.Write the balanced chemical equation for aerobic cellular respiration, including state symbols if you know them.
4.The inner membrane of a mitochondrion has many folds. What are these folds called, and explain how folding helps the mitochondrion carry out respiration.
Part B: Trace the pathway
5.Where does glycolysis occur, and where do the later stages of aerobic respiration occur?
6.A student says, “The mitochondrion makes energy from nothing.” Correct this statement using the terms glucose, energy transfer and ATP.
7.During a short, intense sprint, a muscle cell cannot receive oxygen quickly enough for its energy demand. Name the process that can continue in the cytoplasm and the main product formed from pyruvate in human muscle cells.
8.True or false: lactate is the direct cause of muscle soreness felt a day or two after hard exercise. Give one sentence to justify your answer.
TrueFalse
Part C: Apply and explain
9.A germinating seed releases carbon dioxide even though it is not photosynthesising. Explain why the seed is releasing carbon dioxide and name a substrate its cells can respire.
10.Compare aerobic respiration with anaerobic fermentation in human muscle cells. Include oxygen use, location, and relative ATP yield.
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