Question 1

Compare the Domains of Archaea and Eukarya in regards to their features.

Accepted Answer

Feature Archaea Eukarya
Nucleu...

Question 2

Which of these is the most accurate description of a virus?

Accepted Answer

A)   a noncellular living organism
B)   one of the smallest bacteria known
C)   a member of the kingdom Virusae
D)   a cell at the boundary between living and nonliving things
E)   chemical complexes of RNA or DNA protected by proteinF) B) and D)
G) A) and E) E

Question 3

Some twentieth-century authors wrote that the earliest protocells would have to be autotrophs.This concept appears to be

Accepted Answer

A)   correct, since heterotrophs would depend upon eating autotrophs.
B)   correct, since life is not possible without ATP which is only available in living systems.
C)   correct, since glycolysis and fermentation only occur after oxygen is present from photosynthesis.
D)   incorrect, since the primordial soup could contain many preformed food molecules.
E)   incorrect, since glycolysis and fermentation require complex enzymes for catalytic reactions.F) A) and C)
G) A) and B)

Question 4

Which of the following is a benefit of microbes?

Accepted Answer

A)   All of these are benefits of microbes.
B)   Various microbes help protect us from harmful microbes.
C)   Aid in digestion.
D)   Synthesize vitamin K an vitamin B12.
E)   Breakdown organic molecules.F) A) and E)
G) A) and B)

Question 5

Which of the following organisms is considered a microbe?

Accepted Answer

A)   bacteria
B)   snail
C)   eagle
D)   oak tree
E)   roundwormF) A) and D)
G) All of the above

Question 6

Louis Pasteur conducted an experiment to answer the question of whether or not living things can arise spontaneously from nonliving materials.In this experiment he used two flasks of sterile broth.How could this demonstrate the invalidity of spontaneous generation?

Accepted Answer

A)   In the flask in which no outside materials could enter, no growth occurred while growth did occur in the flask that allowed outside air to enter demonstrating that the living things came from outside the sterile broth.
B)   No growth occurred in either flask demonstrating that sterile broth could not promote growth.
C)   Both flasks showed growth demonstrating that spontaneous generation does occur.
D)   While both flasks showed growth, the flask that did not allow air to enter showed a higher growth demonstrating that while spontaneous generation does not occur that it does not take air to permit growth.
E)   No growth occurred in either flask demonstrating that sterilizing the broth removed its nutrients so growth could not occur regardless of whether or not life was present.F) B) and C)
G) A) and D)

Question 7

Which of the following is considered to be noncellular?

Accepted Answer

A)   bacteria
B)   fungi
C)   algae
D)   protozoans
E)   virusesF) A) and E)
G) None of the above

Question 8

Some human diseases appear to be due to protein agents that may convert other proteins in the cell to also become these agents; this new disease protein agent is called a(n)

Accepted Answer

A)   archeon.
B)   prion.
C)   cyanobacterium.
D)   phage.
E)   retrovirus.F) C) and D)
G) C) and E)

Question 9

Pathogenic bacteria are becoming increasingly deadly as

Accepted Answer

A)   Humans refuse to wash their hands frequently enough.
B)   Antibiotic resistance builds when more and more humans take unnecessary antibiotics.
C)   They pick up genes from humans allowing them to fool human body cells into thinking that they are harmless.
D)   Humans lose their natural immunity to many pathogens through lack of exposure.
E)   There are an increasing number of side effects from antibiotics.F) A) and B)
G) B) and E)

Question 10

What is the evolutionary relationship among Archaea,Bacteria,and Eukarya?

Accepted Answer

A)   Since Archaea are the most primitive, Archaean ancestors gave rise to bacteria that in turn gave rise to eukaryotes.
B)   All three domains are equally distant from the most primitive common ancestor, a protocell.
C)   Archaea and Eukarya share nucleic acid similarities so Eukarya split off from Archaea.
D)   Bacterial ancestors gave rise to both Archaea and to eukaryotes as two separate side branches.
E)   Archaea ancestors gave rise to both bacteria and to eukaryotes as two separate side branches.F) A) and E)
G) A) and C)

Question 11

The Archaea include all of the following EXCEPT the

Accepted Answer

A)   methanogens.
B)   lichens.
C)   halophiles.
D)   thermoacidophiles.
E)   prokaryotes.F) B) and D)
G) B) and E)

Question 12

Describe the steps in viral replication.

Accepted Answer

1.Attachment: the spikes of the virus bi...

Question 13

Which statement is NOT true about bacteria?

Accepted Answer

A)   They lack mitochondria.
B)   They lack a nucleus but contain DNA.
C)   They reproduce sexually.
D)   They occur in three basic shapes.
E)   They have a single circular chromosome.F) A) and E)
G) A) and B)

Question 14

Bacterial metabolism is quite diverse and can range from heterotrophic individuals that are anaerobic to ones that use mitochondria to run cellular respiration.

Accepted Answer

A) True 
 B)False

Question 15

To be an effective antibiotic or chemotherapeutic agent,it is necessary

Accepted Answer

A)   not to kill the human host or cause allergic reactions.
B)   to be able to kill a bacterial cell only.
C)   not to kill the human host or cause allergic reactions AND to be able to kill a bacterial cell only.
D)   to change the genome of the bacterial disease agent.
E)   to stop any universal living cell process.F) A) and B)
G) C) and D)

Question 16

How are the archaea different from bacteria?

Accepted Answer

A)   Archaea show the earliest form of photosynthetic ability.
B)   Bacteria lack the peptidoglycan cell wall found in the Archaea.
C)   Archaea have a monolayer of lipids with branched side chains.
D)   The Archaea have evolved far more advanced forms of metabolism than bacteria.
E)   Archaea have very delicate plasma membranes compared to more durable bacteria.F) A) and E)
G) C) and E)

Question 17

The organic soup in which the first cell is believed to have arisen probably contained

Accepted Answer

A)   isolated atoms.
B)   bubbling hot gases only.
C)   algae and other microscopic organisms.
D)   amino and organic acids.
E)   nucleic acids and proteins.F) B) and E)
G) B) and D)

Question 18

Viruses are

Accepted Answer

A)   smaller than bacteria.
B)   usually more than 1 micron long.
C)   larger than protists.
D)   immeasurable.
E)   unicellular.F) A) and D)
G) B) and E) A

Question 19

Which term does NOT apply to the first protocell?

Accepted Answer

A)   fermentation
B)   autotrophic
C)   membrane-bound
D)   single-celled
E)   self-replicatingF) D) and E)
G) A) and E) B

Question 20

Through molecular interaction of the macromolecules in the primitive ocean,the self-replicating system of ____ evolved.

Accepted Answer

A)   protein  →\rarr→  RNA  →\rarr→  DNA
B)   protein →\rarr→  DNA  →\rarr→  RNA
C)   RNA  →\rarr→  protein  →\rarr→  DNA
D)   RNA  →\rarr→  DNA  →\rarr→  protein
E)   DNA  →\rarr→  RNA  →\rarr→  protein F) A) and E)
G) A) and D)

Exam 28: Microbiology

Compare the Domains of Archaea and Eukarya in regards to their features.

Correct AnswerverifiedFeature Archaea EukaryaNucleu...View AnswerShow Answer

Which of these is the most accurate description of a virus?

Correct AnswerverifiedE

Some twentieth-century authors wrote that the earliest protocells would have to be autotrophs.This concept appears to be

Correct AnswerverifiedShow Answer

Which of the following is a benefit of microbes?

Correct AnswerverifiedShow Answer

Which of the following organisms is considered a microbe?

Correct AnswerverifiedShow Answer

Louis Pasteur conducted an experiment to answer the question of whether or not living things can arise spontaneously from nonliving materials.In this experiment he used two flasks of sterile broth.How could this demonstrate the invalidity of spontaneous generation?

Correct AnswerverifiedShow Answer

Which of the following is considered to be noncellular?

Correct AnswerverifiedShow Answer

Some human diseases appear to be due to protein agents that may convert other proteins in the cell to also become these agents; this new disease protein agent is called a(n)

Correct AnswerverifiedShow Answer

Pathogenic bacteria are becoming increasingly deadly as

Correct AnswerverifiedShow Answer

What is the evolutionary relationship among Archaea,Bacteria,and Eukarya?

Correct AnswerverifiedShow Answer

The Archaea include all of the following EXCEPT the

Correct AnswerverifiedShow Answer

Describe the steps in viral replication.

Correct Answerverified1.Attachment: the spikes of the virus bi...View AnswerShow Answer

Which statement is NOT true about bacteria?

Correct AnswerverifiedShow Answer

Bacterial metabolism is quite diverse and can range from heterotrophic individuals that are anaerobic to ones that use mitochondria to run cellular respiration.

Correct AnswerverifiedShow Answer

To be an effective antibiotic or chemotherapeutic agent,it is necessary

Correct AnswerverifiedShow Answer

How are the archaea different from bacteria?

Correct AnswerverifiedShow Answer

The organic soup in which the first cell is believed to have arisen probably contained

Correct AnswerverifiedShow Answer

Viruses are

Correct AnswerverifiedA

Which term does NOT apply to the first protocell?

Correct AnswerverifiedB

Through molecular interaction of the macromolecules in the primitive ocean,the self-replicating system of ____ evolved.

Correct AnswerverifiedShow Answer

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Nucleu...
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1.Attachment: the spikes of the virus bi...
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