Microbiology with Diseases by Body System (4th Edition)
4th Edition
ISBN: 9780321918550
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 (4th Edition)
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...
Ch. 3 - Many antimicrobial drugs target bacterial cell...Ch. 3 - Colchicine is a drug that inhibits microtubule...Ch. 3 - A cell may allow a large or charged chemical to...Ch. 3 - Which of the following statements concerning...Ch. 3 - A 9 + 2 arrangement of microtubules is seen in...Ch. 3 - Which of the following is most associated with...Ch. 3 - Which of the following is not associated with...Ch. 3 - Which of the following is true of Svedbergs? a....Ch. 3 - Which of the following statements is true? a. The...Ch. 3 - Prob. 8MCCh. 3 - Bacterial flagella are ______________. a. anchored...Ch. 3 - Prob. 10MCCh. 3 - A Gram-negative cell is moving uric acid across...Ch. 3 - Gram-positive bacteria _______________. a. have a...Ch. 3 - Endospores ________________. a. are reproductive...Ch. 3 - Prob. 14MCCh. 3 - Dipicolinic acid is an important component of...Ch. 3 - Match the structures on the left with the...Ch. 3 - Match the term on the left with its description on...Ch. 3 - Label the structures of the following prokaryotic...Ch. 3 - Label each type of flagellar arrangement.Ch. 3 - A scientist who is studying passive movement of...Ch. 3 - Describe (or draw) an example of diffusion down a...Ch. 3 - Sketch, name, and describe three flagellar...Ch. 3 - Prob. 3SACh. 3 - The term fluid mosaic has been used in describing...Ch. 3 - A local newspaper writer has contacted you, an...Ch. 3 - Prob. 6SACh. 3 - Compare bacterial cells and algal cells, giving at...Ch. 3 - Contrast a cell of Streptococcus pyogenes (a...Ch. 3 - Differentiate among pili, fimbriae, and cilia,...Ch. 3 - Prob. 10SACh. 3 - Prob. 11SACh. 3 - Prob. 12SACh. 3 - What is the function of glycocalyces and fimbriae...Ch. 3 - Prob. 14SACh. 3 - Compare and contrast three types of passive...Ch. 3 - Prob. 16SACh. 3 - Prob. 17SACh. 3 - Prob. 18SACh. 3 - Prob. 1CTCh. 3 - Methylene blue binds to DNA. What structures in a...Ch. 3 - Prob. 3CTCh. 3 - Prob. 4CTCh. 3 - A researcher carefully inserts an electrode into...Ch. 3 - Prob. 6CTCh. 3 - An electron micrograph of a newly discovered cell...Ch. 3 - An entry in a recent scientific journal reports...Ch. 3 - Prob. 9CTCh. 3 - Prob. 10CTCh. 3 - Prob. 11CTCh. 3 - Prob. 12CTCh. 3 - Prob. 13CTCh. 3 - Prob. 14CTCh. 3 - Using the following terms, fill in the following...
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