Multiple Choice
Which of the following scenarios describes the aerobic breakdown of glucose?
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8. Respiration
Introduction to Cellular Respiration
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Which one of the following molecules is a by-product of cellular respiration?
A
Water.
B
Glucose.
C
Pyruvate.
D
Oxygen.
E
ADP.
Verified step by step guidance1
Understand the process of cellular respiration, which involves breaking down glucose to produce energy in the form of ATP, with by-products being released.
Recall the main stages of cellular respiration: glycolysis, the citric acid cycle (Krebs cycle), and oxidative phosphorylation.
Identify the by-products produced at each stage: during glycolysis, pyruvate is produced; during the citric acid cycle, carbon dioxide is released; and during oxidative phosphorylation, water is formed as a by-product.
Recognize that water is formed when electrons are transferred to oxygen, the final electron acceptor, in the electron transport chain, combining with protons to form water.
Conclude that water is the by-product of cellular respiration, as it is produced during the final stage of the process.
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