MBIO 3401 Final Exam Questions and
Answers 100% Correct
Which of the following steps is not part of the life cycle of a lytic phage? the phage DNA
integrates into the bacterial chromosome
Which of the following is incorrect about a virus it is a cellular particle
the term ______________ describes a polycistronic messenger RNA whose expression is under
control of a promoter operon
the nucleoids of bacteria and most archaea, as well as the nuclear DNA of eukaryotes, are kept
_______________ supercoiled negatively
enzymes that modify the supercoiling of a DNA molecule are called topoisomerases
In the figure below, which models DNA semiconservative replication, the numeral I points to
________, II points to ___________, and III points to ______________ new daughter
strands, origin, replication fork
,DNA and RNA polymerases can only synthesize in the ___________ direction 5'-3'
The largest bacteria known so far is thiomargarita namibiensis
What region of the chromosome in E. Coli is involved in the replication termination process
ter
besides the nucleoid, two other kinds of DNA molecules that may b present in the cytoplasm of a
bacterial cell are ____________ and the genomes of ____________________ plasmids,
bacteriophages
which of these represents a correct order of proteins involved in bacterial DNA replications
DnaA-->primase-->DNA pol III-->ligase
In the figure below, what enzymes do 1, 2, and 3 represent RNase H, DNA Pol I, DNA
ligase
In order for septation to occur, which process much finish first DNA replication
,During replication, the lagging strand is synthesized ______________________, while the
leading strand can be synthesized ________________ discontinuously; continuously
_____________ RNA polymerase plus sigma factor together are called ___________________
core; holoenzyme
the process of taking a DNA template and making a complementary RNA molecule is called
transcription
Which of the following is not part of initiation of transcription binding of sigma factor to
promoter followed by binding of core RNA polymerase
molecules of sRNA do not encode proteins but are used to ________________ the stability or
translation of specific mRNAs into proteins regulate
which drug intercalates into DNA and inhibits transcription in both prokaryotes and eukaryotes
actinomycin D
, plasmids can be transferred from one bacterium to another via the process of conjugation
the sigma factor is directly required for transcription initiation
which of these represents a correct order of proteins involved in bacterial translation? IF2-
->EF-Tu-->EF-G-->RF3
peptidyltransferase catalyzes the movement of the peptide from the tRNA in the ___________ to
the tRNA in the __________ P-site; A-site
All of the following are true of transcription initiation except GTP hydrolysis catalyzes
bubble formation
chaperones are proteins that help other proteins fold properly
a medically important example of active transport is that of drug __________ proteins powered
by the hydrogen ion gradient efflux
Answers 100% Correct
Which of the following steps is not part of the life cycle of a lytic phage? the phage DNA
integrates into the bacterial chromosome
Which of the following is incorrect about a virus it is a cellular particle
the term ______________ describes a polycistronic messenger RNA whose expression is under
control of a promoter operon
the nucleoids of bacteria and most archaea, as well as the nuclear DNA of eukaryotes, are kept
_______________ supercoiled negatively
enzymes that modify the supercoiling of a DNA molecule are called topoisomerases
In the figure below, which models DNA semiconservative replication, the numeral I points to
________, II points to ___________, and III points to ______________ new daughter
strands, origin, replication fork
,DNA and RNA polymerases can only synthesize in the ___________ direction 5'-3'
The largest bacteria known so far is thiomargarita namibiensis
What region of the chromosome in E. Coli is involved in the replication termination process
ter
besides the nucleoid, two other kinds of DNA molecules that may b present in the cytoplasm of a
bacterial cell are ____________ and the genomes of ____________________ plasmids,
bacteriophages
which of these represents a correct order of proteins involved in bacterial DNA replications
DnaA-->primase-->DNA pol III-->ligase
In the figure below, what enzymes do 1, 2, and 3 represent RNase H, DNA Pol I, DNA
ligase
In order for septation to occur, which process much finish first DNA replication
,During replication, the lagging strand is synthesized ______________________, while the
leading strand can be synthesized ________________ discontinuously; continuously
_____________ RNA polymerase plus sigma factor together are called ___________________
core; holoenzyme
the process of taking a DNA template and making a complementary RNA molecule is called
transcription
Which of the following is not part of initiation of transcription binding of sigma factor to
promoter followed by binding of core RNA polymerase
molecules of sRNA do not encode proteins but are used to ________________ the stability or
translation of specific mRNAs into proteins regulate
which drug intercalates into DNA and inhibits transcription in both prokaryotes and eukaryotes
actinomycin D
, plasmids can be transferred from one bacterium to another via the process of conjugation
the sigma factor is directly required for transcription initiation
which of these represents a correct order of proteins involved in bacterial translation? IF2-
->EF-Tu-->EF-G-->RF3
peptidyltransferase catalyzes the movement of the peptide from the tRNA in the ___________ to
the tRNA in the __________ P-site; A-site
All of the following are true of transcription initiation except GTP hydrolysis catalyzes
bubble formation
chaperones are proteins that help other proteins fold properly
a medically important example of active transport is that of drug __________ proteins powered
by the hydrogen ion gradient efflux
