Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 6.1, Problem 1R
Summary Introduction
To review:
The formation of a membrane bilayer by the hydrophilic and hydrophobic regions of phospholipids.
Introduction:
The cell membrane of the cell is dynamic in nature. It is made up of phospholipids. Phospholipids are divided into two parts: the head part is hydrophilic in nature and the tail part is hydrophobic in nature. Proteins are also present in the lipid bilayer.
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Life: The Science of Biology
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- What features in the chemical composition of phospholipids make them ideal components of the cytoplasmic membrane?arrow_forwardWhat is the main function of the phospholipid bilayer?arrow_forwardWhich of the following correctly describes the structure of the phospholipid bilayer in plasma membranes? The polar hydrophilic groups of each leaflet face outward, toward the aqueous environment on either side of the membrane. A The non-polar hydrophobic groups of each leaflet face inward, toward each other. The non-polar hydrophilic groups of each leaflet face outward, toward the aqueous environment on either side of the membrane. B The polar hydrophobic groups of each leaflet face inward, toward each other. The polar hydrophilic groups of each leaflet face inward, toward each each other. The non-polar hydrophobic groups of each leaflet face outward, toward the aqueous environment on either side of the membrane. The non-polar hydrophilic groups of each leaflet face inward, toward each each other. The polar hydrophobic groups of each leaflet face outward, toward the aqueous environment on either side of the membrane.arrow_forward
- (a) Describe permeability of a phospholipid bilayer for the following molecules. Use terms: non-permeable, high permeability, medium permeability. N2, O2, Na+, glucose, sucrose (disaccharide), glycogen, H2O, KCl, K+, Mg2+, glycine and protein (b) Discuss the role of carbonic anhydrase in CO2 transport. (c) Discuss the cause of ‘cold denaturation’ of proteins.arrow_forwardb) Cellular membranes are generally found in environments that contain lots of water. Draw a diagram of what the phospholipid bilayer of a plasma membrane would look like if it were placed in a hydrophobic environment. (**Note that you only have to draw the phospholipid bilayer, you don't have to draw the other major components again as you did in part a) poned In salt wer (ho byorout obods f.Cplan why sctive tnsport is requind in tive tre nolaib beisio c) What part or parts of a cellular membrane play(s) a role in determining the fluidity of the membrane? pslomlo belowarrow_forwardHow do phospholipids regulate the flow of hydrophilic molecules? How does the bilayer layer regulate the flow of hydrophobic molecules?arrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license