Describethe role of cholesterol in maintaining the fluidity of the lipid bilayer of a cell?

SCI260 –Introduction to BiochemistryLesson 61.Describe (in words) the overall structure of a lipid bilayer.2.What are the properties (i.e., characteristics)of the lipid bilayerof a cell that makeit impermeabletoions and most molecules?3.Describethe role of cholesterol in maintaining the fluidity of the lipid bilayer of a cell?4.The triglycerides inanimals tend to be solids (i.e., fats) at room temperature whereasthe triglycerides in plants tend to be liquids (i.e., oils) at roomtemperature. Based on this fact, what can you conclude about the characteristics of the fatty acidsin animal triglycerides compared to the fatty acids in plant triglycerides?5.Peanut oil contains a high percentage of monounsaturated triglycerides whereas vegetable oil contains a higher percentage of polyunsaturated triacylglycerols. A bottle of peanut oil and a bottle of vegetable oil are stored in a pantry with an outside wall. During a cold spell, the peanut oil freezes,but the vegetable oil remains liquid. Explain why.6.How many molecules of ATP are generated when stearic acid (i.e., stearate), an 18-carbon saturated fatty acid, iscompletely oxidized via the beta-oxidation pathway in the mitochondria?a)112b)129c)146d)1637.Which of the following fatty acids below are essential for humans?*Select one or more.a)Oleic acidb)Linoleic acidc)Linolenic acidd)Palmitoleic acide)Eicosapentaenoic acid (EPA)

8.Refer to Question 7, look up the structures of each fatty acid that is essential and explain why they are essentialforhumans?9.Are trans fatty acidssaturated or unsaturated?10.Provide four (4)examplesof foods that containtrans fatty acids.You may use your textbook and/or the internet to assist you. You will earn 10 pointsfor correctly answering each question (maximum points earned = 100 points

 

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Describethe role of cholesterol in maintaining the fluidity of the lipid bilayer of a cell

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