Molecular Biology Exam Questions with Verified
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Terms in this set (248)
Which ONE of the lacB (The structural genes are lacZ, lacY, and lacA —
following IS NOT a lacB is not one of them.)
structural gene in the lac
operon? (EXAM MCQ) **
a)lacB
b) lacA
c) lacY
d) lacZ
The bacterial Always a single circular piece of DNA
chromosome is (EXAM
MCQ)
a)Always a single circular
piece of DNA
b) Contained in the
nucleus of the cell
c) Linear and/or circular
DNA
d) Replicated in a
conservative manner
,In terms of the initiation of Involves the binding of ribosome small subunit to the
mRNA synthesis, which Shine-Delgarno sequence (This refers to translation,
ONE of the following not the initiation of mRNA synthesis.)
statements is FALSE?
(EXAM MCQ)
a)Involves the binding of
ribosome small subunit to
the Shine-Delgarno
sequence
b) Involves the binding of
RNA polymerase to a
promoter sequence
c) Is enhanced in
prokaryotes by the
presence of sigma-factors
d) Results in the formation
of a transcription bubble
Prokaryotic translation is When a stop codon enters the ribosome A site
terminated when (EXAM
MCQ) *
a)When a stop codon
enters the ribosome A site
b)When the RNA
polymerase releases
sigma factor
c) When the ribosome
spontaneously
disassembles
d) When a hairpin loop
forms in the RNA followed
by a run of U residues
, In terms of the DNA The lagging strand grows towards the replication fork
replication fork, select the (It grows away from the replication fork in short
ONE FALSE statement fragments.)
from the list below (EXAM
MCQ)
a)The leading strand is
replicated continuously
towards the replication
fork in the
5'—>3' direction
b)A replication fork
moves away from the site
of origin
c)The lagging strand
grows towards the
replication fork
d) DNA helicase unwinds
the DNA strand at the
replication fork
What is the function of the RNA template generation
primase enzyme? (EXAM (Primase synthesizes a short RNA primer.)
MCQ) *
a)RNA template
generation
b) Fills in nucleotides
between Okazaki
fragments
c) Breaks hydrogen bonds
of a DNA double helix
d) Inserts nucleotides in a
5'—>3' direction
Solutions 100% Verified
Save
Terms in this set (248)
Which ONE of the lacB (The structural genes are lacZ, lacY, and lacA —
following IS NOT a lacB is not one of them.)
structural gene in the lac
operon? (EXAM MCQ) **
a)lacB
b) lacA
c) lacY
d) lacZ
The bacterial Always a single circular piece of DNA
chromosome is (EXAM
MCQ)
a)Always a single circular
piece of DNA
b) Contained in the
nucleus of the cell
c) Linear and/or circular
DNA
d) Replicated in a
conservative manner
,In terms of the initiation of Involves the binding of ribosome small subunit to the
mRNA synthesis, which Shine-Delgarno sequence (This refers to translation,
ONE of the following not the initiation of mRNA synthesis.)
statements is FALSE?
(EXAM MCQ)
a)Involves the binding of
ribosome small subunit to
the Shine-Delgarno
sequence
b) Involves the binding of
RNA polymerase to a
promoter sequence
c) Is enhanced in
prokaryotes by the
presence of sigma-factors
d) Results in the formation
of a transcription bubble
Prokaryotic translation is When a stop codon enters the ribosome A site
terminated when (EXAM
MCQ) *
a)When a stop codon
enters the ribosome A site
b)When the RNA
polymerase releases
sigma factor
c) When the ribosome
spontaneously
disassembles
d) When a hairpin loop
forms in the RNA followed
by a run of U residues
, In terms of the DNA The lagging strand grows towards the replication fork
replication fork, select the (It grows away from the replication fork in short
ONE FALSE statement fragments.)
from the list below (EXAM
MCQ)
a)The leading strand is
replicated continuously
towards the replication
fork in the
5'—>3' direction
b)A replication fork
moves away from the site
of origin
c)The lagging strand
grows towards the
replication fork
d) DNA helicase unwinds
the DNA strand at the
replication fork
What is the function of the RNA template generation
primase enzyme? (EXAM (Primase synthesizes a short RNA primer.)
MCQ) *
a)RNA template
generation
b) Fills in nucleotides
between Okazaki
fragments
c) Breaks hydrogen bonds
of a DNA double helix
d) Inserts nucleotides in a
5'—>3' direction
