Question

what are the waste products of cellular respiration?
oxygen and water
carbon dioxide and sugar
water and sugar
water and carbon dioxide

Explanation:

Cellular respiration is the process where cells break down glucose (sugar) using oxygen to produce energy (ATP). The chemical equation for aerobic cellular respiration is \( C_6H_{12}O_6 + 6O_2
ightarrow 6CO_2 + 6H_2O + ATP \). From this, the waste products are carbon dioxide (\( CO_2 \)) and water (\( H_2O \)). Let's analyze the options:

• "oxygen and water": Oxygen is a reactant, not a waste product. Eliminate.
• "carbon dioxide and sugar": Sugar is a reactant (glucose), not a waste product. Eliminate.
• "water and sugar": Sugar is a reactant. Eliminate.
• "water and carbon dioxide": Matches the products from the respiration equation.

Answer:

D. water and carbon dioxide (assuming the red option is D; if options are labeled differently, adjust the label but the text is "water and carbon dioxide")