Which substance serves as the primary fuel for cells during cellular respiration to produce energy?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Biology Mcqsbiology-mcqs
Published
2 Feb 2020
Last updated
28 May 2026

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Explanation

Cells primarily use glucose as the main source of fuel in cellular respiration to generate energy. While complex carbohydrates and proteins can be broken down into simpler forms, glucose is the direct molecule metabolized in this process.

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