BIOL130 Study Guide - Final Guide: Lipid Bilayer, Signal Transduction, Tight Junction
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16 Oct 2011
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Biology 130- module 3- practice multiple choice questions. Plasma membranes: enclose entire cell, have openings for osmosis, allow nothing to enter. Membrane functions do not include: signal transduction, energy transduction, dna transduction. In a membrane proteins penetrate: part way into lipid bilayer, cannot penetrate lipid bilayer. Phospholipids contain a ____ backbone, and are phosphoglycerides: glycerol, glycoglycerol, gags. Serine is a phosphoglyceride which produces the: cell suicide signal, cell drinking signal, cell maturation signal. Sphingolipids contain: amino acid and long hydrocarbon chain, amino acid and glucose molecules, amino acid and protein. False about cholesterol: 50% of animal plasma membranes, helps control cell membrane fluidity, can create cell membranes from nothing. Glycoproteins are present in: chitin and gags of ecm, oligosaccharides, glucose creation. Which is not a class of membrane proteins: Intergral proteins: pass through lipid bilayer, cannot penetrate lipid bilayer, are not a true protein.
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1.) Which of the following statement best describes how bacteriain a hot spring control the fluidity of their plasma membrane?
They decrease the percentage of lipids with unsaturatedhydrocarbon chains in their plasma membrane |
Because they don't synthesize cholesterol, they cannot controlmembrane fluidity and therefore have a very fluid plasmamembrane. |
They use cholesterol to prevent membranes from becoming toofluid. |
They form lipid rafts to prevent too much fluidity |
They increase the percentage of lipids with unsaturatedhydrocarbon chains in their plasma membrane. |
2.) Which activity can only be done by a transmembraneprotein?
To be phosphorylated |
To signal from one side of the membrane to the other |
To be glycosylated |
To associate with other proteins |
To bind transiently to a lipid bilayer |