MICROBIOLOGY Final Exam Questions
and Answers Top Rated A+ 2025
Which of the following could be used to sterilize plastic Petri
plates in a plastic wrapper?
Autoclave
Gamma radiation
Microwaves
Sunlight
Ultraviolet radiation
Gamma radiation
In Figure 7.1, what is the thermal death time for culture (a)?
150°C
60 min.
120 min.
100°C
Can't tell
60 min.
Which of the following will NOT preserve foods?
Desiccation
High pressure
Ionizing radiation
Microwaves
Osmotic pressure
Microwaves.
Assume that one culture is a freshly opened package of dried
yeast with 0.1% moisture, another culture is the same yeast
with 7.5% moisture, and the third culture is a package of
yeast mixed with water. Each culture was exposed to 130°C
in a hot-air oven. Which graph in Figure 7.1 most likely
shows the yeast with 0.1% moisture?
,a
b
c
a and b
b and c
c
Which of the following statements is false regarding a
bacterium that is R+?
It possesses a plasmid.
R+ can be transferred to a cell of the same species.
It is resistant to certain drugs and heavy metals.
It is F+.
R+ can be transferred to a different species.
It is F+.
(Use Table 8.2.) What is the sequence of amino acids
encoded by the following sequence of bases in a strand of
DNA?
3' ATTACGCTTTGC
Leucine-arginine-lysine-alanine
Asparagine-arginine-lysine-alanine
Asparagine-cysteine-valine-serine
Transcription would stop at the first codon
Can't tell
Transcription would stop at the first codon
The initial effect of ionizing radiation on a cell is that it
causes
DNA to break.
Bonding between adjacent thymines.
Base substitutions.
,The formation of highly reactive ions.
The cells to get hot.
The formation of highly reactive ions.
DNA is constructed of
A single strand of nucleotides with internal hydrogen
bonding.
Nucleotides bonded A-C and G-T.
Two strands of nucleotides running antiparallel.
Two strands of identical nucleotides with hydrogen bonds
between them.
None of these.
Two strands of nucleotides running antiparallel.
Protein synthesis in eukaryotes is similar to the process in
prokaryotes in that both eukaryotes and prokaryotes
Have exons.
Have introns.
Require snRNPS.
Use methionine as the "start" amino acid.
Use codons to arrange amino acids.
Use codons to arrange amino acids.
Which enzyme does NOT make sticky ends?
Enzyme HaeIII
The reaction catalyzed by DNA polymerase is
DNA mRNA
mRNA cDNA
mRNA protein
DNA DNA
tRNA mRNA
DNA --> DNA
Gene silencing blocks an undesirable product by
Allosteric inhibition of an enzyme.
, End-product repression.
Making double-stranded RNA.
Blocking transcription.
Blocking DNA replication.
Making double-stranded RNA.
A specific gene can be inserted into a cell by all of the
following EXCEPT
Protoplast fusion.
A gene gun.
Microinjection.
Electroporation.
Agrobacterium.
Protoplast fusion.
The phylogenetic classification of bacteria is based on
Cell morphology.
Gram reaction.
rRNA sequences.
Habitat.
Diseases.
rRNA sequences.
In Table 10.1, which feature(s) is (are) found only in
prokaryotes?
1, 2, 3
4, 6
2
1
2, 4, 5
4, 6
Into which group would you place a multicellular organism
that has a mouth and lives inside the human liver?
Animalia
and Answers Top Rated A+ 2025
Which of the following could be used to sterilize plastic Petri
plates in a plastic wrapper?
Autoclave
Gamma radiation
Microwaves
Sunlight
Ultraviolet radiation
Gamma radiation
In Figure 7.1, what is the thermal death time for culture (a)?
150°C
60 min.
120 min.
100°C
Can't tell
60 min.
Which of the following will NOT preserve foods?
Desiccation
High pressure
Ionizing radiation
Microwaves
Osmotic pressure
Microwaves.
Assume that one culture is a freshly opened package of dried
yeast with 0.1% moisture, another culture is the same yeast
with 7.5% moisture, and the third culture is a package of
yeast mixed with water. Each culture was exposed to 130°C
in a hot-air oven. Which graph in Figure 7.1 most likely
shows the yeast with 0.1% moisture?
,a
b
c
a and b
b and c
c
Which of the following statements is false regarding a
bacterium that is R+?
It possesses a plasmid.
R+ can be transferred to a cell of the same species.
It is resistant to certain drugs and heavy metals.
It is F+.
R+ can be transferred to a different species.
It is F+.
(Use Table 8.2.) What is the sequence of amino acids
encoded by the following sequence of bases in a strand of
DNA?
3' ATTACGCTTTGC
Leucine-arginine-lysine-alanine
Asparagine-arginine-lysine-alanine
Asparagine-cysteine-valine-serine
Transcription would stop at the first codon
Can't tell
Transcription would stop at the first codon
The initial effect of ionizing radiation on a cell is that it
causes
DNA to break.
Bonding between adjacent thymines.
Base substitutions.
,The formation of highly reactive ions.
The cells to get hot.
The formation of highly reactive ions.
DNA is constructed of
A single strand of nucleotides with internal hydrogen
bonding.
Nucleotides bonded A-C and G-T.
Two strands of nucleotides running antiparallel.
Two strands of identical nucleotides with hydrogen bonds
between them.
None of these.
Two strands of nucleotides running antiparallel.
Protein synthesis in eukaryotes is similar to the process in
prokaryotes in that both eukaryotes and prokaryotes
Have exons.
Have introns.
Require snRNPS.
Use methionine as the "start" amino acid.
Use codons to arrange amino acids.
Use codons to arrange amino acids.
Which enzyme does NOT make sticky ends?
Enzyme HaeIII
The reaction catalyzed by DNA polymerase is
DNA mRNA
mRNA cDNA
mRNA protein
DNA DNA
tRNA mRNA
DNA --> DNA
Gene silencing blocks an undesirable product by
Allosteric inhibition of an enzyme.
, End-product repression.
Making double-stranded RNA.
Blocking transcription.
Blocking DNA replication.
Making double-stranded RNA.
A specific gene can be inserted into a cell by all of the
following EXCEPT
Protoplast fusion.
A gene gun.
Microinjection.
Electroporation.
Agrobacterium.
Protoplast fusion.
The phylogenetic classification of bacteria is based on
Cell morphology.
Gram reaction.
rRNA sequences.
Habitat.
Diseases.
rRNA sequences.
In Table 10.1, which feature(s) is (are) found only in
prokaryotes?
1, 2, 3
4, 6
2
1
2, 4, 5
4, 6
Into which group would you place a multicellular organism
that has a mouth and lives inside the human liver?
Animalia
