©JUSTTRACY EXAM SOLUTIONS
21/11/202410:20AM
Microbiology Final Exam Questions
And Improved Responses
which of the following pairs is mismatched? - answers✔✔RNA polymerase - makes a
molecule of RNA from an RNA template
which of the following statements is false? - answers✔✔DNA replication proceeds in only
one direction around the bacterial chromosome
which of the following is not a product of transcription? - answers✔✔a new strand of DNA
If the sequence of amino acids encoded by a strand of DNA is serine-alanine-lysine-leucine,
the coding for the sense strand of DNA is - answers✔✔3' AGACGTTTCAAT
the anticodon for valine is - answers✔✔CAA
what type of mutation will occur if the codon UCG is replaced with UCU in the sequence
shown below?
UUA-GCA-AAG-UCG - answers✔✔silent mutation
Both base substitution and frameshift mutations can result in the formation of premature stop
codons. - answers✔✔true
in an operon, the switch that controls mRNA synthesis is the promotor, which is a sequence
of bases upstream from the first structural gene - answers✔✔false
a mutation that inactivates the gene that expresses the repressor of the lac operon results in -
answers✔✔continuous transcription of the structural genes
how do all viruses differ from bacteria? - answers✔✔viruses are not composed of cells
, ©JUSTTRACY EXAM SOLUTIONS
21/11/202410:20AM
Continuous cell lines differ from primary cell lines in that - answers✔✔continous cell lines
can be maintained through an indefinite number of generations
which of the following statements is not true of lysogeny - answers✔✔it causes lysis of host
cells
virus's ability to infect an animal cell depends primarily upon the - answers✔✔presence of
receptor sites on the cell membrane
which of the following places these items in the correct order for DNA-virus replication? -
answers✔✔DNA synthesis, transcription, translation, maturation
which of the following statements about viruses is false? - answers✔✔viruses always use
their own catabolic enzymes
some viruses, such as human herpesvirus 1 (simplexvirus), infect a cell without causing
symptoms for long time. These are called - answers✔✔latent viruses
the following steps occur during multiplication of retroviruses. which is the fourth step? -
answers✔✔synthesis of double-stranded cDNA
the basic mechanism of viral multiplication is similar for all viruses - answers✔✔true
binomial nomenclature is used to name viruses - answers✔✔false
viruses are the only known infections agents that are obligatory intracellular parasites -
answers✔✔false
biosynthesis of viral components varies depending on whether is a DNA virus or an RNA
virus - answers✔✔true
an infectious protein is a - answers✔✔prion
21/11/202410:20AM
Microbiology Final Exam Questions
And Improved Responses
which of the following pairs is mismatched? - answers✔✔RNA polymerase - makes a
molecule of RNA from an RNA template
which of the following statements is false? - answers✔✔DNA replication proceeds in only
one direction around the bacterial chromosome
which of the following is not a product of transcription? - answers✔✔a new strand of DNA
If the sequence of amino acids encoded by a strand of DNA is serine-alanine-lysine-leucine,
the coding for the sense strand of DNA is - answers✔✔3' AGACGTTTCAAT
the anticodon for valine is - answers✔✔CAA
what type of mutation will occur if the codon UCG is replaced with UCU in the sequence
shown below?
UUA-GCA-AAG-UCG - answers✔✔silent mutation
Both base substitution and frameshift mutations can result in the formation of premature stop
codons. - answers✔✔true
in an operon, the switch that controls mRNA synthesis is the promotor, which is a sequence
of bases upstream from the first structural gene - answers✔✔false
a mutation that inactivates the gene that expresses the repressor of the lac operon results in -
answers✔✔continuous transcription of the structural genes
how do all viruses differ from bacteria? - answers✔✔viruses are not composed of cells
, ©JUSTTRACY EXAM SOLUTIONS
21/11/202410:20AM
Continuous cell lines differ from primary cell lines in that - answers✔✔continous cell lines
can be maintained through an indefinite number of generations
which of the following statements is not true of lysogeny - answers✔✔it causes lysis of host
cells
virus's ability to infect an animal cell depends primarily upon the - answers✔✔presence of
receptor sites on the cell membrane
which of the following places these items in the correct order for DNA-virus replication? -
answers✔✔DNA synthesis, transcription, translation, maturation
which of the following statements about viruses is false? - answers✔✔viruses always use
their own catabolic enzymes
some viruses, such as human herpesvirus 1 (simplexvirus), infect a cell without causing
symptoms for long time. These are called - answers✔✔latent viruses
the following steps occur during multiplication of retroviruses. which is the fourth step? -
answers✔✔synthesis of double-stranded cDNA
the basic mechanism of viral multiplication is similar for all viruses - answers✔✔true
binomial nomenclature is used to name viruses - answers✔✔false
viruses are the only known infections agents that are obligatory intracellular parasites -
answers✔✔false
biosynthesis of viral components varies depending on whether is a DNA virus or an RNA
virus - answers✔✔true
an infectious protein is a - answers✔✔prion
