Multiple choice

What are the raw materials of respiration?

  1. oxygen and water

  2. sugar(food) and oxygen

  3. carbon dioxide and water

  4. sugar (food) and carbon dioxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cellular respiration requires glucose (sugar) and oxygen as reactants to produce energy. These starting substances, or raw materials, undergo a chemical reaction inside cells to yield carbon dioxide, water, and ATP.

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