What are the products of cellular respiration? A) glucose and oxygen B) carbon dioxide, H2O, ATP
The products of cellular respiration are carbon dioxide ($CO_2$), water ($H_2O$), and ATP. So the correct choice is B, because respiration breaks down glucose using oxygen to release energy stored as ATP while producing $CO_2$ and $H_2O$.
What this question is really asking
Cellular respiration takes energy stored in glucose and converts it into usable cellular energy. The key is to identify what goes in (reactants) versus what comes out (products).
The overall cellular respiration equation
A common summary equation is:
$$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{ATP (energy)}$$
From the right side of the equation, you can read off the products.
Matching the answer choices
- A) glucose and oxygen: these are the reactants, not the products.
- B) carbon dioxide, $H_2O$, ATP: these are the products, formed after glucose is broken down and energy is captured as ATP.
Quick memory tip
Respiration is like โburningโ sugar: it uses oxygen and releases $CO_2$ and water, and the cell captures some of the released energy as ATP.
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