Question

The process of respiration is ______.

Options

• an oxidation reaction which is endothermic.

• a reduction reaction which is exothermic.

• a combination reaction which is endothermic.

• an oxidation reaction which is exothermic.

Answer 1

The process of respiration is an oxidation reaction which is exothermic.

Explanation:

Respiration is an oxidation reaction because glucose (C₆H₁₂O₆) chemically reacts with oxygen to break down into carbon dioxide and water. It is highly exothermic because this metabolic breakdown releases substantial chemical energy as heat and ATP, fueling living cells.