Multiple Choice
Which one of the following molecules is a by-product of cellular respiration?
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24. Metabolism and Nutrition
Introduction to Cellular Respiration
Multiple Choice
Which of the summary statements below describes the results of the following reaction?
C6H12O6 + 6 O2 → 6 CO2 6 H2O + Energy
A
C6H12O6 is oxidized and O2 is reduced.
B
O2 is oxidized and H2O is reduced.
C
CO2 is reduced and O2 is oxidized.
D
O2 is reduced and CO2 is oxidized.
Verified step by step guidance1
Identify the type of reaction: The given reaction is a cellular respiration reaction, where glucose (C6H12O6) is broken down in the presence of oxygen (O2) to produce carbon dioxide (CO2), water (H2O), and energy.
Understand oxidation and reduction: In a redox reaction, oxidation refers to the loss of electrons, while reduction refers to the gain of electrons. In biological systems, this often involves the transfer of hydrogen atoms or oxygen atoms.
Analyze the reactants and products: Glucose (C6H12O6) is being converted to carbon dioxide (CO2), which involves the loss of hydrogen atoms and the gain of oxygen atoms, indicating that glucose is oxidized.
Examine the role of oxygen: Oxygen (O2) is being converted to water (H2O), which involves the gain of hydrogen atoms, indicating that oxygen is reduced.
Summarize the redox process: Based on the analysis, glucose (C6H12O6) is oxidized as it loses electrons (in the form of hydrogen), and oxygen (O2) is reduced as it gains electrons (in the form of hydrogen), confirming the correct summary statement.
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