Select all answers that apply. Which of the following will decrease membrane fluidity in a human cell membrane? Increase the amount of cholesterol Decrease saturation of the hydrocarbon tails Lengthen the fatty acid hydrocarbon tails Increase saturation of hydrocarbon tails Shorten the fatty acid hydrocarbon tails

Select all answers that apply. Which of the following will decrease membrane fluidity in a human cell membrane? Increase the amount of cholesterol Decrease saturation of the hydrocarbon tails Lengthen the fatty acid hydrocarbon tails Increase saturation of hydrocarbon tails Shorten the fatty acid hydrocarbon tails

Body Structures & Functions

12th Edition

ISBN:9781285695495

Author:Scott

Publisher:Scott

Chapter2: Chemistry Of Living Things

Section: Chapter Questions

Problem 1M

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Select all answers that apply. Which of the following are common features of phospholipids and triacylglycerol? They are both present in the membrane They both have a glycerol backbone They both contain fatty acids They are both amphipathic They are both synthesized via hydrolysis reactions
Discuss the differences between saturated fatty acids, cis unsaturated fatty acids, and trans fatty acids including how they impact membrane dynamics and health. This answer should be very concise and brief, and shouldn't take up more than a half a page of a standard word document in 12 point font. Thank you!
Which of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to increase that membrane's fluidity? arachidonic acid with 20 carbons and two carbon-to-carbon double bonds stearic acid, with 18 carbons and no carbon-to-carbon double bonds None of the above arachidonic acid with 20 carbons and three carbon-to-carbon double bonds
Which of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to decrease that membrane’s fluidity? linolenic acid, with 18 carbons and three carbon-to-carbon double bonds linoleic acid, with 18 carbons and two carbon-to-carbon double bonds stearic acid, with 18 carbons and no carbon-to-carbon double bonds oleic acid, with 18 carbons and one carbon-to-carbon double bond all of the above molecules are saturated, and equally likely to decrease membrane fluidity
From the list below, select the statements that are FALSE. (more than one) OThe hydropathy index plot is used to identify hydrophobic patches inside the cell membrane's architecture. The GPI anchor is a special biomolecule linking a protein to the cell membrane. The phosphoglycerides of the cell membrane contain only saturated or monounsaturated fatty acids. O Phosphoglycerides are to be considered amphiphilic. ONaturally, unsaturated fatty acids typically exist in the trans configuration.
You are studying the effects of temperature and lipid composition on membrane fluidity using artificial membranes containing only one or a few kinds of lipids and no proteins. Assume that you and your lab partner have made the following artificial membranes: Membrane 1: Made entirely of phosphatidylethanolamine. Each of the two chains of the fatty acids is 18 carbon in length and both are completely saturated. Membrane 2: Made entirely of phosphatidylethanolamine with 14-carbon fatty acid chains. only one fatty acid tail contains a double bond, the other one is completely saturated. Membrane 3: Made entirely of phosphatidylethanolamine with 14-carbon fatty acid chains. Both fatty acid tails have a single double bond. Predict the transition temperature of the above-mentioned membranes.
Explain why phospholipids (i.e. phosphoglycerides and sphingomyelins) are found in cell membrane but not triglycerides (triacylglycerols)
In contrast to phospholipids, the transport of fatty acids across membranesis much more rapid (less than a second). Propose an explanation for this observation.
Select all answers that apply
Which of these general statements is TRUE about the lipid called phosphatidylethanolamine (or PE)? PE is NOT an aminophospholipid. 3 of these 4 responses are correct PE resides mainly in the outer leaflet of the membrane bilayer. PE is zwitterionic at normal cell pH. PE is a type of cholesterol.
Explain from a chemical stand point why ATP has a high phosphoryl-transfer potential. Make sure to compare ATP with its hydrolysis products, ADP and inorganic phosphate.
Choose the TRUE statement. A phospholipid micelle (not a liposome) can be characterized as Forming a water in oil dispersion Having polar heads group-oriented inward AN aggregate forming below critical micellar concentration Having polar groups oriented outward. A spherical species featuring a double layer of phospholipid surrounding an aqueous compartment.