Nesters Microbiology A Human Perspective 8th Edition By Anderson Lecturer – Test Bank

Chapter 11

The Diversity of Prokaryotic Organisms

Multiple Choice Questions

It has been estimated that 99% of the intestinal bacteria are
A.facultative anaerobes.
B. obligate aerobes.
C. facultative aerobes.
D. obligate anaerobes.

ASM Objective: 03.01 Bacteria and Archaea exhibit extensive, and often unique, metabolic diversity (e.g. nitrogen fixation, methane production, anoxygenic photosynthesis).
ASM Topic: Module 03 Metabolic Pathways
Bloom’s Level: 1. Remember
Learning Outcome: 11.01
Section: 11.01
Topic: Microbial World

The methanogens
A.

are part of the Domain Archaea.

oxidize hydrogen gas to produce methane.
C.appear only in aerobic environments.
D. use oxygen as a terminal electron acceptor.
E.

are part of the Domain Archaea AND oxidze hydrogen gas to produce methane.

Methanogens often grow in association with
A.nitrifying bacteria.
B. lithotrophic bacteria.
C. photosynthetic bacteria.
D. fermentative bacteria.

ASM Objective: 03.02 The metabolic abilities of a cell determine how it interacts with other cells and its environment (e.g. quorum sensing, oxygen consumption, nitrogen transformations).
ASM Topic: Module 03 Metabolic Pathways
Bloom’s Level: 2. Understand
Learning Outcome: 11.01
Section: 11.01
Topic: Microbial World

Comparatively greater energy is released when
A.carbon dioxide is the final electron acceptor.
B. hydrogen is the final electron acceptor.
C. nitrate is the final electron acceptor.
D. oxygen is the final electron acceptor.

Hydrogen sulfide
A. is produced when sulfur compounds are used as terminal electron acceptors.
B. may react with iron to produce a black precipitate.
C. is produced by Desulfovibrio.
D. has a rotten egg smell.
E. All of the choices are correct.

ASM Objective: 03.01 Bacteria and Archaea exhibit extensive, and often unique, metabolic diversity (e.g. nitrogen fixation, methane production, anoxygenic photosynthesis).
ASM Topic: Module 03 Metabolic Pathways
Bloom’s Level: 2. Understand
Learning Outcome: 11.01
Section: 11.01
Topic: Microbial World

Endospores
A.are a form of reproduction.
B. are a dormant form of a bacterium.
C. are formed by members of medically relevant groups of bacteria.
D. are involved in anaerobic respiration.
E. are a dormant form of a bacterium AND are formed by members of medically relevant groups of bacteria.

ASM Objective: 02.02 Bacteria and Archaea have specialized structures (e.g. flagella, endospores, and pili) that often confer critical capabilities.
ASM Topic: Module 02 Structure and Function
Bloom’s Level: 2. Understand
Learning Outcome: 11.01
Section: 11.01
Topic: Microbial World

Lactic acid bacteria such as Lactococcus
A. produce catalase.
B. are obligate fermenters.
C. require anaerobic environments.
D. use oxygen as a final electron acceptor.

ASM Objective: 03.02 The metabolic abilities of a cell determine how it interacts with other cells and its environment (e.g. quorum sensing, oxygen consumption, nitrogen transformations).
ASM Topic: Module 03 Metabolic Pathways
Bloom’s Level: 1. Remember
Learning Outcome: 11.01
Section: 11.01
Topic: Microbial World

Streptococcus pyogenes
A. is alpha-hemolytic.
B. is gamma-hemolytic.
C. is beta-hemolytic.
D. may form endospores.
E. is alpha-hemolytic AND may form endospores.

ASM Objective: 08.03 Use appropriate methods to identify microorganisms (media-based, molecular and serological).
ASM Topic: Module 08 Microbiology Skills
Bloom’s Level: 1. Remember
Learning Outcome: 11.01
Topic: Tools and Methods of Culturing, Classifying, and Identify Microorganims

The lactobacilli, in their role as normal flora of the vagina, help the vagina resist infection by contributing to
A.the neutrality of the vaginal mucus.
B. acidity of the vagina.
C. food for the resident vaginal flora.
D. fertility of the host.

Which of the following colonize the vagina during childbearing years?
A.Streptococci
B. Clostridium
C. Lactobacilli
D. Enterobacter
E. Clostridium AND lactobacilli