Chapter 07 Microbial Growth

Chapter 07 Microbial Growth

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

Multiple Choice Questions

1. Media containing some ingredients of unknown chemical composition are called __________ media.
   A.undefined
   B. complex
   C. defined
   D. synthetic

ASM Objective: 03.03 The survival and growth of any microorganism in a given environment depends on its metabolic characteristics.
ASM Objective: 03.04 The growth of microorganisms can be controlled by physical, chemical, mechanical, or biological methods.
ASM Topic: Module 03 Metabolic Pathways
Blooms Level: 1. Remember
Learning Outcome: 07.06.02 Distinguish defined (synthetic) media from complex media and the uses of liquid from solid growth media
Section: 07.06
Topic: Culturing Microorganisms

2. Agar is an excellent solidifying agent for microbiological media because
   A.it is not degraded by most microorganisms.
   B. solid agar remains solid until the temperature is raised to 90°C, and liquid agar remains liquid if the temperature is lowered to 45°C.
   C. it is not degraded by most microorganisms and solid agar remains solid until the temperature is raised to 90°C, and liquid agar remains liquid if the temperature is lowered to 45°C are correct.
   D. agar provides an excellent source of nutrition for a variety of different microorganisms.

ASM Objective: 03.03 The survival and growth of any microorganism in a given environment depends on its metabolic characteristics.
ASM Objective: 03.04 The growth of microorganisms can be controlled by physical, chemical, mechanical, or biological methods.
ASM Topic: Module 03 Metabolic Pathways
Blooms Level: 2. Understand
Learning Outcome: 07.06.03 List the characteristics of agar that make it a particularly useful solidifying agent
Section: 07.06
Topic: Culturing Microorganisms

3. For surface cultivation of microorganisms, a sulfated polymer called agar can be extracted from __________ and added to liquid media in order to cause it to solidify.
   A.bacteria
   B. animal fat
   C. algae
   D. fungi

ASM Objective: 03.03 The survival and growth of any microorganism in a given environment depends on its metabolic characteristics.
ASM Objective: 03.04 The growth of microorganisms can be controlled by physical, chemical, mechanical, or biological methods.
ASM Topic: Module 03 Metabolic Pathways
Blooms Level: 1. Remember
Learning Outcome: 07.06.03 List the characteristics of agar that make it a particularly useful solidifying agent
Section: 07.06
Topic: Culturing Microorganisms

4. A growth medium that favors the growth of some microorganisms but inhibits the growth of other microorganisms is a __________ medium.
   A.selective
   B. differential
   C. selective and differential
   D. neither selective nor differential

ASM Objective: 03.03 The survival and growth of any microorganism in a given environment depends on its metabolic characteristics.
ASM Objective: 03.04 The growth of microorganisms can be controlled by physical, chemical, mechanical, or biological methods.
ASM Topic: Module 03 Metabolic Pathways
Blooms Level: 1. Remember
Learning Outcome: 07.06.04 Compare and contrast supportive (general purpose), enriched, selective, and differential media, listing examples of each and describing how each is used
Section: 07.06
Topic: Culturing Microorganisms

5. A growth medium that distinguishes among different groups of bacteria on the basis of their biological characteristics is called a __________ medium.
   A.selective
   B. differential
   C. enrichment
   D. transport

ASM Objective: 03.03 The survival and growth of any microorganism in a given environment depends on its metabolic characteristics.
ASM Objective: 03.04 The growth of microorganisms can be controlled by physical, chemical, mechanical, or biological methods.
ASM Topic: Module 03 Metabolic Pathways
Blooms Level: 1. Remember
Learning Outcome: 07.06.04 Compare and contrast supportive (general purpose), enriched, selective, and differential media, listing examples of each and describing how each is used
Section: 07.06
Topic: Culturing Microorganisms