Biology Chp 9 TB Notes (part 2)

Biology Chp 9 TB Notes (part 2) - Biology Chapter 7 TB...

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Biology Chapter 7 TB Notes (cont’d) - Compartmentalization offers two key advantages: 1. Incompatible chemical reactions can be separated. EX: new fatty acids can be synthesized in one organelle while excess/damaged fatty acids are degraded and recycled in a different organelle 2. The efficiency of chemical reactions is increased. First, substances required for certain reactions can be localized and maintained at high concentration within organelles. Second, if substances are used up in a certain part of the organelle, then can be replaced by substances that have only a short distance to diffuse. Third, groups of enzymes that work together can be clustered on internal membranes instead of floating free in the cytoplasm. - When the product of a reaction is the substance for a reaction catalyzed by another enzyme, clustering the enzymes increases speed/efficiency of a reaction. - Nucleus: membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. - Nuclear Envelope : the double -layered membrane that envelopes the nucleus of a eukaryotic cell , separating the contents of the nucleus from the ( cytoplasm ).
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This note was uploaded on 01/22/2011 for the course BIO 100 taught by Professor Sokolove during the Fall '08 term at UMBC.

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Biology Chp 9 TB Notes (part 2) - Biology Chapter 7 TB...

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