Question 1

The polarity of magnetic cells from the Southern Hemisphere is opposite the polarity of those from the Northern Hemisphere.

Accepted Answer

A) True 
 B)False  True

Question 2

A gram- negative rod, polar flagellated microbe that ferments sugars to ethanol is probably a(n)

Accepted Answer

A)  Gluconobacter. 
B)  Zymomonas. 
C)  Acetobacter. 
D)  Vibrio. 
A)  Gluconobacter. 
B)  Zymomonas. 
C)  Acetobacter. 
D)  Vibrio. B

Question 3

Explain why many thiobacilli are acidophilic.

Accepted Answer

Thiobacillus bacteria grow chemolithotrophically on sulfur- containing compounds such as S⁰, H₂S, and thiosulfate (S₂O₃²^-). A product formed from oxidization of sulfur compounds is sulfuric acid (H₂SO₄), and therefore thiobacilli must be able to tolerate acidic environments.

Question 4

Explain bulking as it occurs in an activated sludge plant. Include the names of some common organisms found in a wastewater treatment facility.

Accepted Answer

Sphaerotilus bacillus- shaped cells can

Question 5

A culture of nitrogen- fixing, free- living bacteria is composed of large gram- negative rods that form resting structures called cysts, and is usually found in nature in neutral and alkaline soils. Its genus name is

Accepted Answer

A)  Derxia. 
B)  Azomonas. 
C)  Azospirillum. 
D)  Azotobacter. 
A)  Derxia. 
B)  Azomonas. 
C)  Azospirillum. 
D)  Azotobacter.

Question 6

Opportunistic pathogens are often referred to as protopathogens.

Accepted Answer

A) True 
 B)False

Question 7

Organisms that attach to solid surfaces will grow in a very dilute nutrient solution.

Accepted Answer

A) True 
 B)False

Question 8

Bacteria able to grow chemolithotrophically at the expense of reduced inorganic nitrogen compounds are called________.

Accepted Answer

The answer of Bacteria able to grow chemolithotrophically at the...

Question 9

Gliding myxobacteria often form multicellular structures called ________. These bacteria have also developed intercellular _________  .

Accepted Answer

fruiting b

Question 10

Azospirillum lipoferum is a terrestrial nitrogen- fixing bacterium that often forms a(n)________relationship with ________.

Accepted Answer

mutualisti

Question 11

Which of the following is NOT a trait of rickettsias?

Accepted Answer

A)  They have not been cultivated in the absence of host cells. 
B)  They are obligate intracellular parasites. 
C)  They lack cell walls. 
D)  Both the host and parasite are required in order to be alive and metabolically active. 
A)  They have not been cultivated in the absence of host cells. 
B)  They are obligate intracellular parasites. 
C)  They lack cell walls. 
D)  Both the host and parasite are required in order to be alive and metabolically active.

Question 12

Which grouping is gram- negative bacillus- shaped, faculatively anaerobic, and commonly found in the intestines of animals?

Accepted Answer

A)  enteric bacteria 
B)  acetic acid bacteria 
C)  pseumonads 
D)  Epsilonproteobacteria 
A)  enteric bacteria 
B)  acetic acid bacteria 
C)  pseumonads 
D)  Epsilonproteobacteria

Question 13

Some acetic acid bacteria can also synthesize the polymer ________from________ monomers.

Accepted Answer

The answer of Some acetic acid bacteria can also synthesize...

Question 14

A broth containing methanol and nitrate is incubated under anaerobic conditions. This medium will select for

Accepted Answer

A)  Hyphomicrobium. 
B)  Azospirillum. 
C)  Nitrobacter. 
D)  Gallionella. 
A)  Hyphomicrobium. 
B)  Azospirillum. 
C)  Nitrobacter. 
D)  Gallionella.

Question 15

Explain the intracytoplasmic photosynthetic membrane systems of the purple phototrophic bacteria and discuss why it is advantageous for these organisms to regulate the quantity of these membranes.

Accepted Answer

The purple phototrophic bacteria can inc

Question 16

Purple phototrophic bacteria are so diverse that they actually are present within the Alpha- , Beta- , and Gammaproteobacteria.

Accepted Answer

A) True 
 B)False

Question 17

Nitrification occurs especially well in habitats where acids are present.

Accepted Answer

A) True 
 B)False

Question 18

Why are purple nonsulfur bacteria named as such despite being capable of using sulfur- containing compounds? Why have they not been put together with the other purple sulfur bacteria?

Accepted Answer

The purple nonsulfur bacteria were initi

Question 19

Bacteria within the genus Wolbachia can influence sexual differentiation in certain insects and amphibians.

Accepted Answer

A) True 
 B)False

Question 20

Which genus is characterized by these traits: gram- negative, straight or slightly curved rod, polar flagella, oxidase- positive, obligately aerobic, and some chemolithotrophic members?

Accepted Answer

A)  Pseudomonas 
B)  Serratia 
C)  Saccharomyces 
D)  Beijerinckia 
A)  Pseudomonas 
B)  Serratia 
C)  Saccharomyces 
D)  Beijerinckia

Exam 17: Bacteria: the Proteobacteria

The polarity of magnetic cells from the Southern Hemisphere is opposite the polarity of those from the Northern Hemisphere.

A gram- negative rod, polar flagellated microbe that ferments sugars to ethanol is probably a(n)

Explain why many thiobacilli are acidophilic.

Explain bulking as it occurs in an activated sludge plant. Include the names of some common organisms found in a wastewater treatment facility.

A culture of nitrogen- fixing, free- living bacteria is composed of large gram- negative rods that form resting structures called cysts, and is usually found in nature in neutral and alkaline soils. Its genus name is

Opportunistic pathogens are often referred to as protopathogens.

Organisms that attach to solid surfaces will grow in a very dilute nutrient solution.

Bacteria able to grow chemolithotrophically at the expense of reduced inorganic nitrogen compounds are called________.

Gliding myxobacteria often form multicellular structures called ________. These bacteria have also developed intercellular _________ .

Azospirillum lipoferum is a terrestrial nitrogen- fixing bacterium that often forms a(n)________relationship with ________.

Which of the following is NOT a trait of rickettsias?

Which grouping is gram- negative bacillus- shaped, faculatively anaerobic, and commonly found in the intestines of animals?

Some acetic acid bacteria can also synthesize the polymer ________from________ monomers.

A broth containing methanol and nitrate is incubated under anaerobic conditions. This medium will select for

Explain the intracytoplasmic photosynthetic membrane systems of the purple phototrophic bacteria and discuss why it is advantageous for these organisms to regulate the quantity of these membranes.

Purple phototrophic bacteria are so diverse that they actually are present within the Alpha- , Beta- , and Gammaproteobacteria.

Nitrification occurs especially well in habitats where acids are present.

Why are purple nonsulfur bacteria named as such despite being capable of using sulfur- containing compounds? Why have they not been put together with the other purple sulfur bacteria?

Bacteria within the genus Wolbachia can influence sexual differentiation in certain insects and amphibians.

Which genus is characterized by these traits: gram- negative, straight or slightly curved rod, polar flagella, oxidase- positive, obligately aerobic, and some chemolithotrophic members?

Microorganisms and Microbiology

A Brief Journey to the Microbial World

Cell Structure and Function in Bacteria and Archaea

Nutrition, Culture, and Metabolism of Microorganisms

Microbial Growth

Molecular Biology of Bacteria

Archael and Eukaryotic Molecular Biology

Regulation of Gene Expression

Viruses and Virology

Genetics of Bacteria and Arachaea

Genetic Engineering

Microbial Genomics

Phototrophy, Chemolithotrophy, and Major Biosyntheses

Catabolism of Organic Compounds

Commercial Products and Biotechnology

Microbial Evolution and Systematics

Other Bacteria

Archaea

Eukaryotic Cell Biology and Eukaryotic Microorganisms

Viral Diversity

Methods in Microbial Ecology

Major Microbial Habitats and Diversity

Nutrient Cycles, Biodegradation, and Bioremediation

Microbial Symbioses

Microbial Growth Control

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology and Immunology

Epidemiology

Person-To-Person Microbial Diseases

Vectorborne and Soilborne Microbial Pathogens

Wastewater Treatment, Water Purification, and Waterborne Microbial Diseases

Food Preservation and Foodborne Microbial Diseases

Filters

Gliding myxobacteria often form multicellular structures called . These bacteria have also developed intercellular _ .

Azospirillum lipoferum is a terrestrial nitrogen- fixing bacterium that often forms a(n)relationship with .

Some acetic acid bacteria can also synthesize the polymer from monomers.