Energy in Biology

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Energy in Biology

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Energy is the capacity to do work.

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Metabolism

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The totality of an organism’s chemical reactions.

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Transforms matter and energy

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An organism’s metabolism transforms matter and energy.

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Anabolic reactions

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Reactions that build complex molecules from simpler ones

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Importance of understanding metabolic reactions

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Key to life science

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Catabolic Pathways

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Catabolic pathways release energy by breaking down complex molecules into simpler compounds.

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Example of anabolic reaction: Proteins

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Building proteins from amino acids

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Purpose of anabolic reactions

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Essential for growth and repair

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Diagram showing a molecular structure with arrows indicating a process, and ATP symbol.

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This diagram illustrates a catabolic pathway involving molecular breakdown and ATP production.

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Diagram showing the breakdown of a large molecule into smaller parts.

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The diagram illustrates the process of breaking down a large molecule, which releases energy, a catabolic pathway.