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QuizMultiple Choice

Elements of Living Organisms

Question 1 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC

Which is a key component of the energy molecule ATP?

Answer
A
sodium
B
phosphorus
C
chlorine
D
sulfur

Explanation

ATP stands for adenosine triphosphate. “Tri-phosphate” refers to its three phosphate groups, which contain phosphorus. Therefore, phosphorus is a key component of ATP.

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