Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 7, Problem 7.4PS
QUANTITATIVE Gorter and Grendel Revisited. Gorter and Grendel’s classic conclusion that the plasma membrane of the human erythrocyte consists of a lipid bilayer was based on the following observations: (i) the lipids that they extracted with acetone from 4.74 × 109 erythrocytes formed a monolayer 0.89 m2 in area when spread out on a water surface, and (ii) the surface area of one erythrocyte was about 100 µm2, according to their measurements.
(a) Show from these data how they came to the conclusion that the erythrocyte membrane is a bilayer.
(b) We now know that the surface area of a human erythrocyte is about 145 µm2. Explain how Gorter and Grendel could have come to the right conclusion when one of their measurements was only about two-thirds of the correct value.
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The classic demonstration that cell plasma membranes are composed ofbilayers depends on the following kinds of data:• The membrane lipids from 4.74 x 109 erythrocytes will form a monolayerof area 0.89 m2 when spread on a water surface.• The surface of one erythrocyte is approximately 100 μm2 in area.Show that these data can be accounted for only if the erythrocyte membraneis a bilayer.
. The classic demonstration that cell plasma membranes are composed of
bilayers depends on the following kinds of data:
• The membrane lipids from 4.74 X 1o° erythrocytes will form a mono-
layer of area 0.89 m² when spread on a water surface.
• The surface of one erythrocyte is approximately 100 um in area.
Show that these data can be accounted for only if the erythrocyte membrane
is a bilayer.
- The classic demonstration that cell plasma membranes are com-
posed of bilayers depends on the following kinds of data:
• The membrane lipids from 4.74 x 10° erythrocytes will form a
monolayer of area 0.89 m² when spread on a water surface.
• The surface of one erythrocyte is approximately 100 µm? in area.
Show that these data can be accounted for only if the erythrocyte
membrane is a bilayer.
Chapter 7 Solutions
Becker's World of the Cell (9th Edition)
Ch. 7 - Which functions of a membrane would be compromised...Ch. 7 - Which of the three historical strands forming...Ch. 7 - Lipids form the fluid part of the fluid mosaic...Ch. 7 - A researcher has carried out a PAGE experiment to...Ch. 7 - Proteins can be attached to the membrane in a...Ch. 7 - Functions of Membranes. For each of the following...Ch. 7 - Elucidation of Membrane Structure. Each of the...Ch. 7 - Wrong Again. For each of the following false...Ch. 7 - QUANTITATIVE Gorter and Grendel Revisited. Gorter...Ch. 7 - Prob. 7.5PS
Ch. 7 - QUANTITATIVE Thats About the Size of It. From...Ch. 7 - Temperature and Membrane Composition. Which of the...Ch. 7 - Membrane Fluidity and Temperature. The effects of...Ch. 7 - The Little Bacterium That Cant. Acholeplasma...Ch. 7 - Hydropathy: The Plot Thickens. A hydropathy plot...Ch. 7 - Problem Set Inside or Outside? From Figure 7-22,...Ch. 7 - Prob. 7.12PS
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