TEST BANK FOR MICROBIOLOGY FUNDAMENTALS A CLINICAL APPROACH 3RD EDITION BY COWAN

TEST BANK FOR MICROBIOLOGY
FUNDAMENTALS A CLINICAL APPROACH
3RD EDITION BY COWAN

, Chapter 1 Introduction to Microbes and Their Building Blocks (McGraw Hill)-Homework



1. Which of the following choices is a correct way to denote the binomial name of a
microorganism?




Multiple Choice




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 Staphylococcus Aureus (correct answer)




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Explanation
The binomial, or scientific name, of a microorganism must be typed in italics or underlined if
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handwritten. In addition, the first letter of the generic part of the name must be capitalized while the first
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letter of the species name is lowercase.
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2.Which of the following is a macromolecule that assembles into bilayers?

Multiple Choice
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 Phospholipid (correct answer)
 Nucleic acid
 Carbohydrate
is




 Protein
3. Please watch the video below, and then use what you have learned from the chapter to answer the
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questions, demonstrating your understanding of biofilms.

1.) What is a biofilm?
sh




 Free-floating bacteria that move through the blood to other sites
 A group of bacteria that accumulate in layers and secrete protective extracellular
material
 A layer of sugars that persist even after bacteria have been killed by antibiotics
 A bacterial cell that secretes an extensive network of fibers around its cell wall Incorrect


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, 2. ) Which of the following is an example of a biofilm commonly found in the human body?
 Dental plaque Correct
 Salivary secretions
 Ear wax
 Yellow or green discharge

3.) Why are biofilms important in infectious disease?
 Bacteria in biofilms are often protected from antibiotics.
 Most microbes cannot cause disease without other microbes present.
 The secreted extracellular "gunk" is highly damaging to tissues.
Explanation




m
Question 1: Bacteria attach to a surface and excrete a sticky extracellular substance. Other species can be




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recruited to the biofilm, and the result is layers of multiple species of bacterial surrounded by a protective




co
coating.




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Question 2: Dental plaque is a biofilm on the surface of your teeth!




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Question 3: Antibiotics are often blocked by the protective coating found in biofilms. Also, bacteria
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may express different genes when they are part of a biofilm and become less susceptible to antimicrobial
drugs.
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4. Match the macromolecules to their function within cells.
aC s
vi y re


Major structural component of cell walls Carbohydrates Correct

Major component of cell membranes Lipids Correct
ed d




Speed up and facilitate chemical reactions within
Proteins Correct
cells
ar stu




Inheritance and expression of genetic traits Nucleic acids Correct
is




Explanation
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DNA and RNA are nucleic acids involved in genetics. Enzymes are proteins that speed up chemical
reactions. Phospholipids make up the bulk of the cell membrane, and several different types of
carbohydrates make up the cell wall in organisms that possess one.
sh




5. Microbes are found in which habitat(s)?



All of choices are correct (Ocean, Earth’s crust, and Human Body)




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, 6. The Dutch linen merchant _______ ground glass lenses to detailed specifications so that he was
able to develop a microscope for observing and describing living microscopic animalcules.
Multiple Choice
*Lister
Pasteur
Koch
Leewenhoek (correct answer)

Explanation
Antonie van Leeuwenhoek developed the first glass lenses, taking the initial step into the field of
microscopy.

7. Move the terms into the correct empty boxes to complete the concept map.




m
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o.
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o
aC s
vi y re
ed d
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is




explanation
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There are both cellular and noncellular types of microbes. All non-cellular microbes, such as viruses or
prions, lack a nucleus. However, of all the cellular microorganisms, only bacteria and archaea lack a
nucleus.
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8. Select statements that apply to the theory of evolution to test your understanding of
evolution.



Check All That Apply



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