Microbiology: A Systems Approach
5th Edition
ISBN: 9781259706615
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 3, Problem 2MCQ
A mixed culture is
- a. the same as a contaminated culture.
- b. one that has been adequately stirred.
- c. one that contains two or more known species.
- d. a pond sample containing algae and protozoa.
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Chapter 3 Solutions
Microbiology: A Systems Approach
Ch. 3.1 - Explain what the Five Is mean and what each step...Ch. 3.1 - Discuss three physical states of media and when...Ch. 3.1 - Compare and contrast selective and differential...Ch. 3.1 - Provide brief definitions for defined and complex...Ch. 3.2 - Prob. 5AYPCh. 3.2 - Prob. 6AYPCh. 3.2 - Prob. 7AYPCh. 3.2 - Prob. 8AYPCh. 3.2 - Compare and contrast the three main categories of...Ch. 3 - Prob. 1MCQ
Ch. 3 - A mixed culture is a. the same as a contaminated...Ch. 3 - Resolution is ____ with a longer wavelength of...Ch. 3 - A real image is produced by the a. ocular. b....Ch. 3 - Prob. 5MCQCh. 3 - The specimen for an electron microscope is always...Ch. 3 - Prob. 7MCQCh. 3 - Bacteria tend to stain more readily with cationic...Ch. 3 - Multiple Matching. For each type of medium, select...Ch. 3 - A fastidious organism must be grown on what type...Ch. 3 - Agar has the disadvantage of being easily...Ch. 3 - A subculture is a culture made from an isolated...Ch. 3 - Prob. 13TFCh. 3 - Prob. 14TFCh. 3 - The best stain to use to visualize a microorganism...Ch. 3 - What is the functional type of mannitol salt agar...Ch. 3 - Create a short paragraph to differentiate among...Ch. 3 - Prob. 3CTQCh. 3 - a.Create a paragraph to differentiate among the...Ch. 3 - You are a scientist studying a marsh area...Ch. 3 - Visual Connections Blooms Level 5: Evaluate These...Ch. 3 - Prob. 1CM
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- What is the difference in composition and use between:a. chemically defined media b. complex culture mediaarrow_forwardA mixed culture isa. the same as a contaminated culture.b. one that has been adequately stirred.c. one that contains two or more known species.d. a pond sample containing algae and protozoaarrow_forwardWhat type of media is used to encourage the growth of only the suspected pathogen from nonsterile specimens containing a diversity of bacterial species? a. O b. OC O d. selective media differential media general media none of the abovearrow_forward
- thirty-six colonies grew on nutrient agar plates when 1.0ml of a 1/10 dilution of a water sample was plated using the standard plate count methodology. How many bacteria were in the original water sample? a.4/ml b.36000/ml c.360/ml d.36/ml e.3600/mlarrow_forwardA fastidious organism must be grown on what type of medium? a. general-purpose medium c. synthetic medium b. differential medium d. enriched mediumarrow_forwardA fastidious organism must be grown on what type of medium?a. general-purpose mediumb. differential mediumc. defined mediumd. enriched mediumarrow_forward
- Microscopic count is used to estimate microbial load of a sample by counting colonies present on the plate. A count of more than 300 colonies on the plate may include overlapping colonies resulting in inaccurate count. a. First statement is TRUE, Second statement is FALSE. b. First statement is FALSE, Second statement is TRUE. c. Both statements are TRUE. d. Both statements are FALSE.arrow_forwardAssuming you are working in a microbiology laboratory and a client sent you a sample for the following analyses: Identification of all microorganisms in the soil sample Enumeration of culturable bacteria in the sample Enumeration of both culturable and non-culturable bacteria in the sample For a to c, explain the following: Method of analyses to be used Step by step report on how the analyses will be conductedarrow_forwardYou pipette 1mL from a 30mL starting culture into a 99mL blank labeled A. You plate 1mL and 0.1mL of blank A onto plates B and C, respectively. Plate B has 310 colonies and Plate C has 31 colonies. What is the total cfu of the original culture? Select one: a. 9.3e5 b. 3.1e3 c. 3.1e4 d. 9.3e4 e. 3.1e5arrow_forward
- A medium in which all the components are known is: A. Minimal medium B. Synthetic or defined medium C. Selective medium D. Complete medium E. Complex medium F. Differential medium G. General purpose mediumarrow_forwardWhich of the following statements BEST represents the great plate count anomaly? a The aggregation of the microbial cells causes a problem in the accurate population estimate using plate count. b The colonies growing on a petri plate is not always the organism under the microscope. c The population count using viable cell count is only 1% of the real population. d The number of microbes seen under the microscope is greater that the colonies growing on a petri plate.arrow_forwardBlood agar contains intact sheep red blood cells which are used to determine if a microbe has the ability to lyse these cells. This agar is properly termed A. a selective differential medium B. a complex medium C. a differential medium and a complex medium D. a selective mediumarrow_forward
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