BIO 1151 Chapter 8

BIO 1151 Chapter 8 - BIO 1151 Chapter 8 Metabolism...

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BIO 1151 Chapter 8 Metabolism Metabolism is the total chemical reactions of an organism Mteabolic Pathway- begins with a specific molecule, ends with a product Each step is catalyzed by a specific enzyme Catabolism- breaking down complex molecules into simpler ones Cellular respiration- breaking down of glucose in the presence of oxygen Anabolism- building complex molecules from simpler ones Synthesis of protwins from amino acids is anabolism Bioenergetics studies how organisms manage their energy resources Forms of Energy Energy is the capacity to cause change or do work Kinetic energy is from motion Heat is thermal kenetic energy associated with atom movement Potential energy is based on location or structure Chemical energy is potential energy from chemical reactions Energy can be transormed from one form to another Laws of Energy Transformation Closed system- isolated from its surroundings Open system- energy and matter can be transferred between systems and its surroundings 1st Law- Conservation of Energy- Energy of the universe is constant 2nd Law- Energy transforms or transfers increase the entropy of the
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BIO 1151 Chapter 8 - BIO 1151 Chapter 8 Metabolism...

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