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The process that produces the largest number of ATP molecules is A - VCE - SSCE Biology - Question 22 - 2012 - Paper 1
Question 22
The process that produces the largest number of ATP molecules is A. synthesis of polypeptide molecules. B. breakdown of glucose during glycolysis. C. the light-indep... show full transcript
Worked Solution & Example Answer:The process that produces the largest number of ATP molecules is A - VCE - SSCE Biology - Question 22 - 2012 - Paper 1
Step 1
Identify the processes involved in ATP production
Answer
To answer this question, we must consider the different processes listed that contribute to ATP production in organisms. The options provided include:
- Synthesis of polypeptide molecules
- Glycolysis
- Light-independent reactions of photosynthesis
- Electron transport chain in cellular respiration
Step 2
Determine ATP yield for each option
Answer
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Synthesis of polypeptide molecules: This process does not produce ATP; instead, it requires ATP for amino acid activation and incorporation into proteins.
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Breakdown of glucose during glycolysis: Glycolysis produces a net gain of 2 ATP molecules per glucose molecule through substrate-level phosphorylation.
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Light-independent reactions of photosynthesis: While these reactions play a role in converting energy, they primarily use ATP generated in the light-dependent reactions, producing less than what is seen in the electron transport chain.
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Electron transport chain in cellular respiration: This process generates the most ATP, producing approximately 30-34 ATP molecules from one glucose molecule, depending on the efficiency of the electron carriers and the proton gradients established.
Step 3