Study guide chapter 8 for AP Bio (Biology by Campbell and Reece)

This study guide is my completed questions to the questions that argon issued by the teacher using the text Biology by Campbell and Reece. Chapter 8: tissue paper layer Structure and Function 1.         Phospholipids consist of a deliquescent head, and a aquaphobic tail. The cell tissue layer is a phospholipid bilayer twain membranes thick. The bilayer is a invariable boundary between two compartments because the molecular arrangement shelters the hydrophobic tails of the phospholipids from water firearm the deliquescent heads stay in the water. a.         It was believed that only the hydrophilic heads of the phospholipids immersed in the water and their was no bilayer. 2.         When the halves of the fr figureured membrane are viewed in the electron microscope, the interior of the bilayer looks cobblestoned, with protein particles wedged in a muted matrix. This shows that membrane proteins are dispersed and distributively inserted into the phospholipid bilayer, with only their hydrophilic regions verboten far enough from the bilayer to be exposed to water. 3.         Membranes essential be fluid to work properly. A membrane form fluid as temperature decreases, until finally the phospholipids cool off into a tight arrangement and the membrane becomes solid. When a membrane solidifies, enzymatic proteins in the membrane may become inactive. a.         A cell can change the lipid composition of their membranes as an accommodation to changing temperature.

For example;, in winter wheat, the percentage of unsaturated phospholipids increases in autumn, an adaptation that keeps the m embranes from solidifying during winter. 4. !         Membrane carbohydrates and proteins are of the essence(p) for a cell to recongnize another cell. Proteins also act as channels across the membrane to allow indisputable solutes out and in. a.         Changing a membranes composition will simulate a membranes function because certain proteins for example are dictated in certain spots for proper joining and recognition. b.         Transport- allows certain... If you postulate to run a full essay, order it on our website: OrderEssay.net

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