Microbiology with Diseases by Body System & Modified MasteringMicrobiology with Pearson eText -- ValuePack Access Card -- for Microbiology with Diseases by Body System Package
1st Edition
ISBN: 9780133857122
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Chapter 3, Problem 3VI
A scientist who is studying passive movement of chemicals across the cytoplasmic membrane of Salmonella enterica serotype Typhi measures the rate at which two chemicals diffuse into a cell as a function of external concentration. The results are shown in the following figure. Chemical A diffuses into the cell more rapidly than does B at lower external concentrations, but the rate levels off as the external concentration increases. The rate of diffusion of chemical B continues to increase as the external concentration increases.
- a. How can you explain the differences in the diffusion rates of chemicals A and B?
- b. Why does the diffusion rate of chemical A taper off?
- c. How could the cell increase the diffusion rate of chemical A?
- d. How could the cell increase the diffusion rate of chemical B?
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Chapter 3 Solutions
Microbiology with Diseases by Body System & Modified MasteringMicrobiology with Pearson eText -- ValuePack Access Card -- for Microbiology with Diseases by Body System Package
Ch. 3 - Prob. 1TMWCh. 3 - In 1985, an Israeli scientist discovered the...Ch. 3 - Why is a pilus a type of fimbria, but a flagellum...Ch. 3 - Why is the microbe illustrated in Figure 3.2 more...Ch. 3 - When the bacterium Escherichia coli is grown in a...Ch. 3 - Prob. 6TMWCh. 3 - Why do scientists consider bacterial and archaeal...Ch. 3 - Why did scientists in the 19th and early 20th...Ch. 3 - Why do some scientists consider archaea, which are...Ch. 3 - Why are eukaryotic glycocalyces covalently bound...
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