Bioenergetics

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BIOENERGETICS

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What is Bioenergetics?

The study of energy in living systems (environments) and the organisms (plants and animals) that utilize them

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Energy

Required by all organisms

May be Kinetic or Potential energy

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Kinetic Energy

Energy of Motion

Heat and light energy are examples

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Potential Energy

Energy of position

Includes energy stored in chemical bonds

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Two Types of Energy Reactions

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Endergonic Reactions

Chemical reaction that requires a net input of energy.

Photosynthesis

6CO2 + 6H2O  C6H12O6 + 6O2

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Exergonic Reactions

Chemical reactions that releases energy

Cellular Respiration

C6H12O6 + 6O2  6CO2 + 6H2O+

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Metabolic Reactions of Cells

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What is Metabolism?

The sum total of the chemical activities of all cells.

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Two Types of Metabolism

Anabolic Pathways

Catabolic Pathways

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Anabolic Pathway

Metabolic reactions, which consume energy (endergonic), to build complicated molecules from simpler compounds.

Photosynthesis

6CO2 + 6H2O  C6H12O6 + 6O2

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Catabolic Pathway

Metabolic reactions which release energy (exergonic) by breaking down complex molecules in simpler compounds

Cellular Respiration

C6H12O6 + 6O2  6CO2 + 6H2O +

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Cellular Energy - ATP

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ATP

Components:

1. adenine: nitrogenous base

2. ribose: five carbon sugar