Energy.
Date Submitted: 09/10/2006 02:48:02
Category: / Science & Technology / Biology
Length: 2 pages (599 words)
Category: / Science & Technology / Biology
Length: 2 pages (599 words)
6.1 Energy
A. Energy
1. Energy is capacity to do work; cells must continually use energy to do biological work.
2. Kinetic energy is energy of motion; all moving objects have kinetic energy.
3. Potential energy is stored energy.
a. Water behind a dam has potential energy that can be converted to kinetic energy.
b. Energy within an atom lies in arrangement of its atoms in molecule; glucose has more
energy than its breakdown components, carbon dioxide and water.
…
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…ATP is constantly recycled from ADP and -- it is continually made, broken down,
and remade in cells.
4. The energy released from ATP ADP + is just about enough for most biological reactions.
D. Function of ATP
1. Chemical work: ATP supplies energy to synthesize macromolecules that make up the cell.
2. Transport work: ATP supplies energy needed to pump substances across the plasma membrane.
3. Mechanical work: ATP supplies energy to move muscles, cilia and flagella, chromosomes, etc.
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