Concept Card / Doubt Card
Q: 11 (a) What is cellular respiration? During cellular respiration, the complete oxidation of one molecule of glucose (C₆H₁₂O₆) releases approximately 38 ATP molecules. If a cell metabolizes 5 molecules of glucose, how many ATP molecules are produced?
Step-by-Step Explanation (Std 10 NCERT Science)
1. Definition of Cellular Respiration
Cellular respiration is the biological process in which cells break down glucose (food molecules) in the presence of oxygen to release energy in the form of ATP (adenosine triphosphate).
Equation:
2. ATP Yield per Glucose
- In aerobic respiration (complete oxidation), 1 molecule of glucose releases ~38 ATP molecules.
These ATP molecules are the “energy currency” of the cell.
3. For 5 molecules of glucose
- If 1 glucose → 38 ATP
- Then 5 glucose → 5×38=190 ATP5 \times 38 = 190 ATP
4. Final Answer
A cell metabolizing 5 molecules of glucose will produce approximately: 190 ATP molecules\mathbf{190 \; ATP \; molecules}
✅ Answer: Cellular respiration is the process of breaking down glucose in cells to release energy in the form of ATP. From 5 glucose molecules, about 190 ATP molecules are produced.
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