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 5TMW
When the bacterium Escherichia coli is grown in a hypertonic solution, it turns on a gene to synthesize a protein that transports potassium into the cell. Why?
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What cell types would be able to grow on the ECM in the following situations?a) Streptomycin was not added to the ECM.b) The ECM contains thiamine.c) The ECM contains all 20 amino acids and all 5 nitrogenous nucleic acid bases.
Reminder: ECM = minimal medium + glucose + has streptomycin antibiotic
Many eukaryote cells are NOT able to synthesize (make their own) the amino acids that they require to conduct life processes. When such a cell is placed in an aqueous (water) solution containing the 20 essential amino acids, one would expect that
a) nothing would happen.
b) amino acids would be moved into the cell by specific membrane transport proteins.
c) H2O would dissolve in the membrane.
d) the cell would make Glucose into amino acids.
e) the cell would divide.
If you isolate a bacteria from the digestive system system of mouse, what would you expect the bacterial response to varying pH to be? What would you likely classify this bacteria as?
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...
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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- The highly pathogenic anaerobic bacterium Clostridium perfringens is responsible for gas gangrene, a condition in which animal tissue structure is destroyed. This bacterium secretes an enzyme that efficiently catalyzes the hydrolysis of the peptide bond indicated in red: where X and Y are any of the 20 common amino acids. How does the secretion of this enzyme contribute to the invasiveness of this bacterium in human tissues? Why does thisenzyme not affect the bacterium itself?arrow_forwardA single celled, prokaryote organism has the ability to use the Na+/K+ pump in their cell membrane to move Na+ out of the cell and K+ into the cell. The Na+ /K+ pump is an example of a functional protein because it a) is a Polypeptide presents specific shapes that interact with (binds with) specific molecules, b) uses electrical interactions with these molecules to produce change in its shape or motion. C) interacts with specific molecules based on the fit of the molecule into specific active sites in the protein, d) As a result of the interaction with specific molecules, it can bind with ATP and use the bond energy in the ATP molecule to move the target molecule(s). e) all the answers are true.arrow_forwardTypically, our cells have a high concentration of sodium ions outside and a low concentration of sodium ions inside. Sodium ions continue to move out of the cell by the process of: a) secondary active transport b) pinocytosis c) facilitated diffusion d)simple diffusion e) primary active transport f) osmosisarrow_forward
- In cell culture experiments, when you add the purified toxin to host cell monolayers, the host cells die. The toxin-infected host cells do not lyse, but the cells have collapsed and show a significant loss of water and ions. The toxin is translated and produced by the bacterium as a single polypeptide. However, cellular fractionation of the host cells into cytosolic and membrane fractions reveals that a portion of the toxin is present in the membrane fraction and another portion is in the cytosolic fraction. Based on these results, answer the following questions: A. What type of toxin have you identified? 2 B. How does this toxin function to kill host cells?arrow_forwardThe image below presents the results of an experiment comparing the effect of Gentamicin and three concentrations of Acetic acid on Escherichia coli. Based on your knowledge about the disk Diffusion method, and the results of the experiment, what would be your recommendation on the use of Acetic acid to control E. coli? 1% acetic acid 5% acetic acid gentamicin 2% acetic acidarrow_forwardOur cells need glucose for energy. When blood glucose is low, glucose must still be moved into our cells against its concentration gradient, using energy from ion gradients. The process used to bring glucose in under these conditions is: a) facilitated diffusion through a channel b) secondary active transport c) osmosis d) facilitated diffusion through a carrier e) primary active transportarrow_forward
- What cell types would be able to grow on the ECM in the following situations? F- , Hfr , Mix a) Streptomycin was not added to the ECM. b) The ECM contains thiamine. c) The ECM contains all 20 amino acids and all 5 nitrogenous nucleic acid basesarrow_forwardIf magnesium ions are in higher concentration outside the cell, they would move into the cell by the process of: a) facilitated diffusion through a carrier protein b) osmosis c) secondary active transport d) facilitated diffusion through a channel protein e) exocytosis f) simple diffusion g) primary active transportarrow_forwardTypically, our cells have a high concentration of sodium ions outside and a low concentration of sodium ions inside. As sodium ions continue to move out of the cell, the protein that they travel through is called a: a) carrier b) pump c)channel d) vesicle e) aquaproinarrow_forward
- You have a cell suspension in an isotonic medium. Explain in detail what would happen when you add: A) 50 mM Urea; or B) 50mM mannitol.arrow_forwardIn the diffusion experiment, phenolphthalein is used as a pH indicator. It will turn in a solution. A) colorless ; basic B) colorless ; acidic C) pink; acidic D) pink; basicarrow_forwardThe following questions refer to membrane protein isolation A) What is the difficulty when working with membrane proteins and extracting them from the membrane? B) Why do you need stabilization of membrane proteins? What reagents are used for stabilization? C) What methods are used to determine if your extracted membrane protein (GPCR) is functional? D) What methods are used for the enrichment of surface proteins? E) What 2 methods are used to analyze and identify surface proteins after extraction?arrow_forward
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