Microbiology Chapter 10 Test Bank
Exam Questions with Latest Update
Which of the following best defines a strain in microbiological terms?
A) a pure culture that is not totally identical to other cultures of the same species
B) a group of organisms with a limited geographical distribution
C) a mixed population of cells,genetically distinct, but with highly similar phenotypic
characteristics
D) groups of cells all derived from and identical to a single parent species
E) same as a species - Answer-a pure culture that is not totally identical to other
cultures of the same species
Serological testing is based on the fact that
A) all bacteria have the same antigens.
B) antibodies react specifically with an antigen.
C) the human body makes antibodies against bacteria.
D) antibodies cause the formation of antigens.
E) bacteria clump together when mixed with any antibodies. - Answer-antibodies
react specifically with an antigen
Phage typing is based on the fact that
A) bacteria are destroyed by viruses.
B) viruses cause disease.
C) bacterial viruses attack only members of a specific species.
D) Staphylococcus causes infections.
E) phages and bacteria are related. - Answer-bacterial viruses attack only members
of a specific species
Organism A has 70 moles % G+C, and organism B has 40 moles % G+C. Which of
the following can be concluded from these data?
A) The two organisms are related.
B) The two organisms are unrelated.
C) The organisms make entirely different enzymes.
D) Their nucleic acids will completely hybridize.
E) None of the answers is correct. - Answer-the two organisms are unrelated
Nucleic acid hybridization is based on the fact that
A) the strands of DNA can be separated.
B) a chromosome is composed of complementary strands.
C) pairing between complementary bases occurs.
D) DNA is composed of genes.
E) all cells have DNA. - Answer-pairing between complementary bases occurs
One of the most popular taxonomic tools is DNA fingerprinting to develop profiles of
organisms. These profiles provide direct information about
A) enzymatic activities.
B) protein composition.
, C) the presence of specific genes.
D) antigenic composition.
E) the similarities between nucleotide sequences. - Answer-the similarities between
nucleotide sequences
All of the following statements are reasons why fluorescent in situ hybridization
(FISH) has become a valuable tool for environmental microbiologists EXCEPT
A) it allows for detection of uncultured microbes.
B) it demonstrates the diversity of microbes in an environment.
C) it allows observation of microbes in their natural environment in association with
other microbes.
D) it allows one to obtain pure cultures of microbes.
E) All of the answers are correct. - Answer-it allows one to obtain pure cultures of
microbes
Which of the following criteria is most useful in determining whether two organisms
are related?
A) Both ferment lactose.
B) Both are gram-positive.
C) Both are motile.
D) Both are aerobic.
E) Each answer is equally important. - Answer-both are gram-positive
A clone is
A) genetically identical cells derived from a single cell.
B) a genetically engineered cell.
C) a taxon composed of species.
D) a mound of cells on an agar medium.
E) None of the answers is correct. - Answer-genetically identical cells derived from a
single cell
In Figure 10.2, which figure shows the most closely related organisms?
A) a
B) b
C) c
D) d
E) e - Answer-b
32) In Table 10.1, which features are found in nearly all eukarya?
A) 2, 3, 5
B) 1, 4, 6
C) 3, 5
D) 2, 3
E) 1, 2, 5 - Answer-2, 3, 5
In Table 10.1, which feature(s) is (are) found only in prokaryotes?
A) 1, 2, 3
B) 4, 6
C) 2
D) 1
Exam Questions with Latest Update
Which of the following best defines a strain in microbiological terms?
A) a pure culture that is not totally identical to other cultures of the same species
B) a group of organisms with a limited geographical distribution
C) a mixed population of cells,genetically distinct, but with highly similar phenotypic
characteristics
D) groups of cells all derived from and identical to a single parent species
E) same as a species - Answer-a pure culture that is not totally identical to other
cultures of the same species
Serological testing is based on the fact that
A) all bacteria have the same antigens.
B) antibodies react specifically with an antigen.
C) the human body makes antibodies against bacteria.
D) antibodies cause the formation of antigens.
E) bacteria clump together when mixed with any antibodies. - Answer-antibodies
react specifically with an antigen
Phage typing is based on the fact that
A) bacteria are destroyed by viruses.
B) viruses cause disease.
C) bacterial viruses attack only members of a specific species.
D) Staphylococcus causes infections.
E) phages and bacteria are related. - Answer-bacterial viruses attack only members
of a specific species
Organism A has 70 moles % G+C, and organism B has 40 moles % G+C. Which of
the following can be concluded from these data?
A) The two organisms are related.
B) The two organisms are unrelated.
C) The organisms make entirely different enzymes.
D) Their nucleic acids will completely hybridize.
E) None of the answers is correct. - Answer-the two organisms are unrelated
Nucleic acid hybridization is based on the fact that
A) the strands of DNA can be separated.
B) a chromosome is composed of complementary strands.
C) pairing between complementary bases occurs.
D) DNA is composed of genes.
E) all cells have DNA. - Answer-pairing between complementary bases occurs
One of the most popular taxonomic tools is DNA fingerprinting to develop profiles of
organisms. These profiles provide direct information about
A) enzymatic activities.
B) protein composition.
, C) the presence of specific genes.
D) antigenic composition.
E) the similarities between nucleotide sequences. - Answer-the similarities between
nucleotide sequences
All of the following statements are reasons why fluorescent in situ hybridization
(FISH) has become a valuable tool for environmental microbiologists EXCEPT
A) it allows for detection of uncultured microbes.
B) it demonstrates the diversity of microbes in an environment.
C) it allows observation of microbes in their natural environment in association with
other microbes.
D) it allows one to obtain pure cultures of microbes.
E) All of the answers are correct. - Answer-it allows one to obtain pure cultures of
microbes
Which of the following criteria is most useful in determining whether two organisms
are related?
A) Both ferment lactose.
B) Both are gram-positive.
C) Both are motile.
D) Both are aerobic.
E) Each answer is equally important. - Answer-both are gram-positive
A clone is
A) genetically identical cells derived from a single cell.
B) a genetically engineered cell.
C) a taxon composed of species.
D) a mound of cells on an agar medium.
E) None of the answers is correct. - Answer-genetically identical cells derived from a
single cell
In Figure 10.2, which figure shows the most closely related organisms?
A) a
B) b
C) c
D) d
E) e - Answer-b
32) In Table 10.1, which features are found in nearly all eukarya?
A) 2, 3, 5
B) 1, 4, 6
C) 3, 5
D) 2, 3
E) 1, 2, 5 - Answer-2, 3, 5
In Table 10.1, which feature(s) is (are) found only in prokaryotes?
A) 1, 2, 3
B) 4, 6
C) 2
D) 1
