Biology CLEP Prep 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What element is necessary for the creation of ATP?

Hydrogen

ATP is a high-energy molecule that is essential for a wide range of cellular processes, including growth, reproduction and movement. Thus, ATP production is critical for the survival of many organisms. The molecule is composed of adenosine and three phosphate groups, which are linked together by high-energy bonds. To generate ATP, plants and some bacteria use photosynthesis, while animals and fungi rely on cellular respiration. During this process, glucose and oxygen are used to produce ATP and carbon dioxide, ensuring a steady supply of both energy and carbon-based compounds. Therefore, while the other options (B, C, and D) may contribute to the overall structure of ATP, hydrogen (A) is the only element needed for ATP synthesis through the process of chemiosmosis. Thus, without hydrogen, the production of ATP would not be possible.

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Carbon

Oxygen

Nitrogen

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