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bioenergetics and respiration
8-15
7
Biology
Undergraduate 1
09/26/2006

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Term
Oxidation
Definition
a molecules loses electrons – often to oxygen, hence the name. Oxidation reactions are usually catabolic. (loses hydrogen)
Term
Reduction:
Definition
a molecule gains electrons. Reduction reactions are usually anabolic. (Gain hydrogen)
Term
ATP
Definition
Adenosine triphosphate (ATP) temporarily stores energy in its covalent bonds. When the covalent
bonds between the phosphate groups break, a large amount of energy is released.
Term
The energy of activation
Definition
the initial boost of energy many chemical reactions require. Enzymes are
proteins that speed up chemical reactions by lowering the energy of activation.
Term
Regulation of enzymes: Negative Feedback:
Definition
When an excess amount of end product is formed, the
product will bind to, and inhibit, enzymes early in the pathway.
Term
Mitochondria
Definition
are the organelles where ATP (energy) is produced. The innermost compartment is called
the matrix and that is where the Kreb’s cycle occurs. The electron transfer occurs inside the inner
membrane.
Term
Glycolysis:
Definition
Glucose (6 carbon molecule) is converted into 2 molecules of pyruvic acid (3 carbon molecule)
with a net gain of 2 ATP and 2 NADH.
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