19
QuizMultiple Choice

Catalysts

Question 19 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC

Photosynthesis is an example of

Answer
A
an exothermic reaction.
B
an endothermic reaction.
C
a reaction that gives off heat.
D
a reaction that emits energy.

Explanation

Photosynthesis takes in energy from sunlight to convert carbon dioxide and water into glucose and oxygen. A reaction that absorbs energy is endothermic, so photosynthesis is an endothermic reaction.

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