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Biology Easy CSS Uploaded: 06 Aug 2026

Which molecule is the primary source of energy for most cellular activities?

  • A Protein
  • B DNA
  • C Glucose
  • D Cholesterol
Correct Answer: Option C — Glucose
Explanation:
Glucose is a simple sugar broken down during cellular respiration to release energy stored in its chemical bonds. This energy is captured as ATP, which powers essential cellular functions including movement, growth, and repair.
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