Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 2, Problem 1Q
Summary Introduction
To analyze:
The volume of aprokaryotic cell and a eukaryotic cell. The diameter of eukaryotic hepatocytes is 20 µm (micrometer). So, thenumber of bacterial cells that would fit in a liver cell is to be estimated.
Introduction:
Prokaryotes are a heterogeneous group, which have many categories of external appearance, like cylindrical (bacillus), spheroidal (cocci), and coiled (spirilla). It has acell wall, plasma membrane, circular DNA (deoxyribonucleic acid) molecule, snd no internal membrane-enclosed organelles.
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Students have asked these similar questions
How many E. coli cells can fit in the volume occupied by a single eukaryotic cell of a round shape with the diameter of 50um? Assume that a E. coli cell is a cylinder with the diameter of 0.5um and the height of 2um.
In this problem am I suppose to already have prior knowledge of the volume of eukaryotic cell and prior knowlege of volume of E coli
To get an idea of the different sizes of various cellular components, do the following calculations: Assume that the cell, its nucleus, and a globular protein – for example, and enzyme – are spherical. In addition, assume the diameter of the protein is 5 nm (nanometers), the diameter of the cell is 100 μm (micrometers), and the diameter of the nucleus is 40 μm. You may have to review your metric conversions!
If you draw the globular protein as a sphere with a diameter of 2 cm (approximately the diameter of a U.S. penny), what size would each of the following measurements of the cell be if drawn to the same scale (5 nm real length = 2 cm)?
a. The radius of a microtubule, 15 nm
b. The diameter of the nucleus
c. The diameter of the cell
d. The volume (V = 4/3 ∏r3) of the globular protein, in decimal form to the hundredths place.
e. The volume of the nucleus
f. The volume of the cell
Explain (using the correct terminology and drawing an image) what happens to the cells in the following environments:
A human blood cell (0.9% salt) is placed in a saltwater tank (27.5% salt).
-
A bacterial cell with 35% organic material in their cytoplasm is living in a tank filled with 35% sulfur.
-
A freshwater plant cell (75% water) is living in a pond that floods over.
Chapter 2 Solutions
Biochemistry: The Molecular Basis of Life
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