General Science • BiologyEasy
What is the primary respiratory substrate utilized during cellular respiration in living organisms?
A. Protein
B. Glucose✓ Correct Answer
C. Fatty acid
D. Nucleic acid
💡 Solution & Explanation
Glucose is the most commonly utilized respiratory substrate oxidized during cellular respiration to release chemical energy in the form of ATP. While proteins and fatty acids can also be broken down for energy, they enter the respiratory pathway at different intermediate stages.
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