Answer: Metabolism is the sum total of all chemical reactions occurring within the cells of a living organism. It includes two main processes: Catabolism: Breaking down complex molecules into simpler ones, releasing energy Anabolism: Building complex molecules from simpler ones, consuming energy Metabolism is considered a defining feature of life, as no non-living object exhibits metabolic activities. These reactions are essential for growth, reproduction, maintaining cellular structures, and responding to environmental stimuli.

BiologyCLASS 11CBSE

answered 31 Mar 2026

What is metabolism?

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Answer: Metabolism is the sum total of all chemical reactions occurring within the cells of a living organism. It includes two main processes:

Catabolism: Breaking down complex molecules into simpler ones, releasing energy
Anabolism: Building complex molecules from simpler ones, consuming energy

Metabolism is considered a defining feature of life, as no non-living object exhibits metabolic activities. These reactions are essential for growth, reproduction, maintaining cellular structures, and responding to environmental stimuli.

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