Question 1

Archaeal cells are about ______ bacterial cells.

Accepted Answer

A)   ten times larger than
B)   ten times smaller than
C)   the same size asD) A) and C)
E) A) and B)

Question 2

The ?rst cells appeared about _____ billion years ago.

Accepted Answer

A)   5
B)   4
C)   3.5
D)   2
E)   1F) C) and D)
G) A) and C)

Question 3

Which of the following are not considered microorganisms?

Accepted Answer

A)   Mosquitoes
B)   Viruses
C)   Protozoa
D)   Bacteria
E)   FungiF) C) and E)
G) A) and B)

Question 4

In which way are archaea and eukaryotes the same?

Accepted Answer

A)   Possess RNA instead of DNA
B)   Contain mitochondria for energy production
C)   Have similar ssu rRNA sequences
D)   Contain membrane-bound organellesE) A) and B)
F) A) and C)

Question 5

Which of the following is a taxon that contains all the other taxa listed?

Accepted Answer

A)   Kingdom
B)   Family
C)   Genus
D)   Species
E)   PhylumF) C) and E)
G) B) and D)

Question 6

Sterile is best described as ______.

Accepted Answer

A)   absence of spores
B)   pathogen-free
C)   pasteurized
D)   absence of any life forms and viral particles
E)   homogenizedF) B) and E)
G) A) and E)

Question 7

The number one worldwide infectious diseases are ______.

Accepted Answer

A)   AIDS-related diseases
B)   diarrheal diseases
C)   respiratory diseases
D)   measles and other rash diseases
E)   malaria and other protozoan diseasesF) C) and D)
G) A) and E)

Question 8

Which of the following does not indicate microbe involvement in energy and nutrient ﬂow?

Accepted Answer

A)   Thermal hot springs warmed by heat from earth's interior
B)   Decomposition of dead matter and wastes
C)   Digestion of complex carbohydrates in animal diets
D)   Formation of greenhouse gases, CO₂ and methaneE) All of the above
F) A) and B)

Question 9

Disease-causing microorganisms are called ______.

Accepted Answer

A)   decomposers
B)   fermenters
C)   eukaryotes
D)   bacteria
E)   pathogensF) C) and E)
G) B) and E)

Question 10

The microorganisms that recycle nutrients by breaking down dead matter and wastes are called ______.

Accepted Answer

A)   pathogens
B)   eukaryotes
C)   decomposers
D)   fermenters
E)   prokaryotesF) A) and E)
G) A) and D)

Question 11

The scienti?c method involves formulating a tentative explanation, called the hypothesis, to account for what has been observed or measured.

Accepted Answer

A) True 
 B)False

Question 12

When assigning a scientiﬁc name to an organism, _______.

Accepted Answer

A)   both genus and species names are capitalized
B)   both genus and species names are italicized or underlined
C)   the species name is capitalized
D)   the species name is placed ﬁrst
E)   the species name can be abbreviatedF) A) and C)
G) All of the above

Question 13

Analysis of the small subunit rRNAs from all organisms in the three current domains suggests that _______.

Accepted Answer

A)   the eukaryotes arose from prokaryotes
B)   the Archaea are more closely related to bacteria than eukaryotes
C)   bacteria, archaea, and eukaryotes are not related
D)   all modern and extinct organisms on earth arose from a common ancestor Refer to "Systems of Presenting a Universal Tree of Life" for a discussion of the ssu rRNAs and theirE) None of the above
F) A) and C)

Question 14

Eukaryotic cells are larger than bacterial or archaeal cells; all cells are larger than macromolecules. Where do viruses ﬁt on this scale?

Accepted Answer

A)   Viruses are smaller than eukaryotic cells, but larger than bacterial or archaeal cells.
B)   Viruses are larger than eukaryotic cells.
C)   Viruses are smaller than macromolecules.
D)   Viruses are smaller than bacterial or archaeal cells, but larger than macromolecules.E) A) and B)
F) A) and C)

Question 15

The three cell types discussed, eukaryotes, archaea, and bacteria, all derived from ______.

Accepted Answer

A)   cells with a true nucleus
B)   a common ancestral cell
C)   archaea
D)   photosynthetic bacteriaE) All of the above
F) C) and D)

Question 16

A hypothesis must be tested many times before it can be considered a theory.

Accepted Answer

A) True 
 B)False

Question 17

A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on _______.

Accepted Answer

A)   recombinant DNA
B)   bioremediation
C)   nomenclature
D)   determining if that species is the cause of a new disease
E)   determining evolutionary relatednessF) A) and C)
G) A) and D)

Question 18

The names of the three proposed domains are: Bacteria, Protista, and Eukarya.

Accepted Answer

A) True 
 B)False

Question 19

The scientiﬁc method includes all of the following except ______.

Accepted Answer

A)   publication
B)   experimentation
C)   observation
D)   hypothesisE) B) and C)
F) None of the above

Exam 1: The Main Themes of Microbiology

Which of the following does not indicate microbe involvement in energy and nutrient ﬂow?

Correct Answer
verified

Analysis of the small subunit rRNAs from all organisms in the three current domains suggests that _______.

Correct Answer
verified

When assigning a scientiﬁc name to an organism, _______.

Correct Answer
verified

The number one worldwide infectious diseases are ______.

Correct Answer
verified

The microorganisms that recycle nutrients by breaking down dead matter and wastes are called ______.

Correct Answer
verified

A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on _______.

Correct Answer
verified

The names of the three proposed domains are: Bacteria, Protista, and Eukarya.

Correct Answer
verified

A hypothesis must be tested many times before it can be considered a theory.

Correct Answer
verified

Archaeal cells are about ______ bacterial cells.

Correct Answer
verified

Disease-causing microorganisms are called ______.

Correct Answer
verified

Eukaryotic cells are larger than bacterial or archaeal cells; all cells are larger than macromolecules. Where do viruses ﬁt on this scale?

Correct Answer
verified

Which of the following is a taxon that contains all the other taxa listed?

Correct Answer
verified

In which way are archaea and eukaryotes the same?

Correct Answer
verified

The ?rst cells appeared about _____ billion years ago.

Correct Answer
verified

Which of the following are not considered microorganisms?

Correct Answer
verified

The three cell types discussed, eukaryotes, archaea, and bacteria, all derived from ______.

Correct Answer
verified

The scienti?c method involves formulating a tentative explanation, called the hypothesis, to account for what has been observed or measured.

Correct Answer
verified

The scientiﬁc method includes all of the following except ______.

Correct Answer
verified

Sterile is best described as ______.

Correct Answer
verified

Exam 1: The Main Themes of Microbiology

Which of the following does not indicate microbe involvement in energy and nutrient ﬂow?

Correct AnswerverifiedShow Answer

Analysis of the small subunit rRNAs from all organisms in the three current domains suggests that _______.

Correct AnswerverifiedShow Answer

When assigning a scientiﬁc name to an organism, _______.

Correct AnswerverifiedShow Answer

The number one worldwide infectious diseases are ______.

Correct AnswerverifiedShow Answer

The microorganisms that recycle nutrients by breaking down dead matter and wastes are called ______.

Correct AnswerverifiedShow Answer

A scientist studying the sequence of nucleotides in the rRNA of a bacterial species is working on _______.

Correct AnswerverifiedShow Answer

The names of the three proposed domains are: Bacteria, Protista, and Eukarya.

Correct AnswerverifiedShow Answer

A hypothesis must be tested many times before it can be considered a theory.

Correct AnswerverifiedShow Answer

Archaeal cells are about ______ bacterial cells.

Correct AnswerverifiedShow Answer

Disease-causing microorganisms are called ______.

Correct AnswerverifiedShow Answer

Eukaryotic cells are larger than bacterial or archaeal cells; all cells are larger than macromolecules. Where do viruses ﬁt on this scale?

Correct AnswerverifiedShow Answer

Which of the following is a taxon that contains all the other taxa listed?

Correct AnswerverifiedShow Answer

In which way are archaea and eukaryotes the same?

Correct AnswerverifiedShow Answer

The ?rst cells appeared about _____ billion years ago.

Correct AnswerverifiedShow Answer

Which of the following are not considered microorganisms?

Correct AnswerverifiedShow Answer

The three cell types discussed, eukaryotes, archaea, and bacteria, all derived from ______.

Correct AnswerverifiedShow Answer

The scienti?c method involves formulating a tentative explanation, called the hypothesis, to account for what has been observed or measured.

Correct AnswerverifiedShow Answer

The scientiﬁc method includes all of the following except ______.

Correct AnswerverifiedShow Answer

Sterile is best described as ______.

Correct AnswerverifiedShow Answer

Correct Answer
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