Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 6, Problem 1AL
Many classification schemes are used to identify bacteria. These start with
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Note that it is not appropriate to self-diagnose outside of a medical context and this is a completely hypothetical scenario.
Imagine you have a rash on your foot. You're concerned that it's an infection and inoculate a sample onto an agar plate. You wonder, How can I figure out whether the pathogen is a bacterium vs a eukaryote?
You decide to use lab supplies to get a basic understanding of the pathogen. Be specific about what tests you use and what you expect the results to be. Limit yourself to experiments we could do in our lab.
What is one experiment you could do, involving culturing the organism?
Note that it is not appropriate to self-diagnose outside of a medical context and this is a completely hypothetical scenario.
Imagine you have a rash on your foot. You're concerned that it's an infection and inoculate a sample onto an agar plate. You wonder, How can I figure out whether the pathogen is a bacterium vs a eukaryote?
You decide to use lab supplies to get a basic understanding of the pathogen. Be specific about what tests you use and what you expect the results to be. Limit yourself to experiments we could do in our lab.
What is a procedure you could do, involving making a slide of the organism?
A microbiologist obtained two pure biological samples: one of a virus, and the other of a viroid. Unfortunately, the labels had been lost. The microbiologist felt she could distinguish the two by analyzing for the presence or absence of a single molecule. What molecule would she search for and why?
Chapter 6 Solutions
Prescott's Microbiology
Ch. 6.2 - MICRO INQUIRY Which capsids are icosahedral? Which...Ch. 6.2 - Prob. 2MICh. 6.2 - MICRO INQUIRY Why is T4 said to have binal...Ch. 6.2 - Retrieve, Infer, Apply 1. How are viruses similar...Ch. 6.2 - Retrieve, Infer, Apply 2. What is the difference...Ch. 6.2 - Retrieve, Infer, Apply 3. Compare the structure of...Ch. 6.2 - Prob. 4CCCh. 6.2 - Retrieve, Infer, Apply 5. All four nucleic acid...Ch. 6.3 - MICRO INQUIRY Which of these mechanisms involves...Ch. 6.3 - MICRO INQUIRY Why do the empty capsids remain...
Ch. 6.3 - Explain why the receptors that viruses have...Ch. 6.3 - What probably plays the most important role in...Ch. 6.3 - How do you think the complexity of the viral...Ch. 6.3 - In general, DNA viruses can be much more dependent...Ch. 6.3 - Consider the origin of viral envelopes and suggest...Ch. 6.3 - Why are the proteins involved in virion assembly...Ch. 6.4 - Why is a lysogen considered a new or different...Ch. 6.4 - Define the terms lysogeny, temperate phage,...Ch. 6.4 - What advantages might a phage gain by being...Ch. 6.4 - Describe lysogenic conversion and its...Ch. 6.4 - How does a latent infection differ from a chronic...Ch. 6.4 - What is a cytocidal infection? What is a...Ch. 6.4 - Define the following terms: tumor, neoplasia,...Ch. 6.4 - Distinguish the mechanism by which dsDNA viruses...Ch. 6.5 - Prob. 1MICh. 6.5 - Prob. 1CCCh. 6.5 - Given that viruses must be cultivated to make...Ch. 6.7 - What are viroids and why are they of great...Ch. 6.7 - How does a viroid differ from a virus? From a...Ch. 6.7 - What is a prion? In what way does a prion differ...Ch. 6.7 - Prob. 4CCCh. 6 - Prob. 1RCCh. 6 - Prob. 2RCCh. 6 - Many classification schemes are used to identify...Ch. 6 - The origin and evolution of viruses is...Ch. 6 - Consider the separate stages of an animal virus...
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- A virologist needs to remove all bacteria from a solution containing viruses without removing the viruses. What should the scientist do?arrow_forwardA veterinarian suspects that a new disease of house cats is caused by a specific type of bacterium. Describe a set of procedures for providing this hypothesis. EXAMPLE GIVEN ON THE IMAGE.arrow_forwardThe culture primarily contains nutrients such as sugars and a gel (agar). Why don’t viruses grow in a culture like bacteria do? Explain.arrow_forward
- There are different types of bacteria classify them based on following: i. Shapes ii. gram stain iii. oxygen demand iv. mode of nutritionarrow_forwardThe process of collecting characteristics of your unknown bacterium can be helped by the use of a dichotomous key. A dichotomous key is a flowchart that can be used to identify an organism. a) in your own words explain how to create and use a dichotomous key to identify unknown bacteriaarrow_forwardWhat are the characteristics of bacteria? What are the characteristics of viruses? Be specific in describing the size, structure, shape, and reproductive cycle of each.arrow_forward
- If a person contracted MRSA and no antibiotics are working on them, how would you go about finding a way to treat their infection? Describe, in detail, how you would devise a plan to save their life utilizing your knowledge of bacteria and viruses.arrow_forwardWhich of the following represents the current system of taxonomy for viruses? Selected Answer: the Baltimore system which relies on the shape of the viral envelope to group viruses. Answers: Using the morphology of the viral particle to group similar shaped viruses. the Baltimore system which relies on the shape of the viral envelope to group viruses. Using the morphology of the capsid and the host organism to group like viruses. the Baltimore system which relies on the type, arrangement and sense of the nucleic acids which make up the genome to group viruses into like groups.arrow_forwardWhich of the following represents the current system of taxonomy for viruses? Selected Answer: the Baltimore system which relies on the shape of the viral envelope to group viruses. Answers: Using the morphology of the viral particle to group similar shaped viruses. the Baltimore system which relies on the shape of the viral envelope to group viruses. Using the morphology of the capsid and the host organism to group like viruses. the Baltimore system which relies on the type, arrangement and sense of the nucleic acids which make up the gemarrow_forward
- Notice the white line indicating a reference for 100 nm. Which 3 viruses have a diameter (width) roughly equal to 100 nm?arrow_forwardHow do I go about drawing a biological drawing of Sarcina lutea? Apparently it has been reclassified as Micrococcus luteus, and I have found an image for me to base my drawing on (image attached), but I don't exactly know which parts to label. Hope I can get some help on this.arrow_forwardThe techniques for identifying unknown bacteria can be summarized in three key steps, explain in your own words how to: Staining the unknown for initial characterization by microscopy. Using a dichotomous key strategy to systematically rule out other organisms. Testing the organism for key biochemical traits.arrow_forward
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