Molecular Genetics Exam 3 Questions With Complete
Solutions
2 types of DNA methyltransferases Correct Answers
maintenance and de novo
Allolactose Correct Answers inducer in LAC operon
Animal ortholog of Sir2 Correct Answers SIRT
Antennapedia Correct Answers Mutation that turns the antenna
of a fly into a leg
Antitermination Correct Answers control of gene expression by
causing terminators to be ignored
Antp genes Correct Answers lead cascade of gene expression
and. regulation of both antennae and feet
are terminators rho dependent? Correct Answers yes
aroH Correct Answers gene for enzyme needed for early steps
of aromatic acid synthesis
attenuated control Correct Answers premature termination of
transcription found in bacterial operons for making amino acids
attenuator Correct Answers a region of RNA sequence that
forms alternative secondary structures that govern the level of
transcription of attenuated operons
,backtracking Correct Answers limit number of nucleotides so
RNAP backs up and releases single standed RNA at 3' end and
then cleaves 3' end to restart synthesis
Barr body Correct Answers In females only 1 X is expressed
and other becomes heterochromatin - this X is the barr body
Beta-flap Correct Answers binds exit channel
BGI I Correct Answers Restriction enzyme used for cathetrin-
DNAse I study that cuts DNA on either side of region being
studied. Produced highest band in both cells (neuronal and
BB88) at cut site
Bubble in elongation Correct Answers Open initiation complex
catabolite activation protien Correct Answers binds DNA and
also binds RNAP
cell specific responses to regulatory modules (example) Correct
Answers Myo blast (MYOD) = genes for muscles
mf-KB = immune cells
Chemical crosslinking Correct Answers amino acid in RNAP
connected to bases it attaches and shows how RNAP affects
things close to it
Coactivators Correct Answers proteins that increase the rate of
transcription but do not directly bind to the DNA itself, instead
they bind to other proteins
, coding strand Correct Answers the strand of DNA that is not
used for transcription and is identical in sequence to mRNA,
except it contains uracil instead of thymine
Constitutive control Correct Answers intrinsic fitness of
promoter (ex: its sequence)
fitness can vary 1000x fold
constitutive expression Correct Answers The genes are ON all
the time — they are expressed continuously, no matter whether
lactose is present or absent.
cross talk Correct Answers phenomenon of regulatory elements
affecting nearby genes
Delayed early transcripts Correct Answers encodes other genes
required for lytic and lysogenic cycle
derespression Correct Answers increase in expression
developmental responses to regulatory modules (example)
Correct Answers antennapedia
Diff DNA binding proteins Correct Answers 1. Helix-turn-helix
2. Homeodomain protiens
3. Ribbon Helix
4. Zinc-finger protiens
Solutions
2 types of DNA methyltransferases Correct Answers
maintenance and de novo
Allolactose Correct Answers inducer in LAC operon
Animal ortholog of Sir2 Correct Answers SIRT
Antennapedia Correct Answers Mutation that turns the antenna
of a fly into a leg
Antitermination Correct Answers control of gene expression by
causing terminators to be ignored
Antp genes Correct Answers lead cascade of gene expression
and. regulation of both antennae and feet
are terminators rho dependent? Correct Answers yes
aroH Correct Answers gene for enzyme needed for early steps
of aromatic acid synthesis
attenuated control Correct Answers premature termination of
transcription found in bacterial operons for making amino acids
attenuator Correct Answers a region of RNA sequence that
forms alternative secondary structures that govern the level of
transcription of attenuated operons
,backtracking Correct Answers limit number of nucleotides so
RNAP backs up and releases single standed RNA at 3' end and
then cleaves 3' end to restart synthesis
Barr body Correct Answers In females only 1 X is expressed
and other becomes heterochromatin - this X is the barr body
Beta-flap Correct Answers binds exit channel
BGI I Correct Answers Restriction enzyme used for cathetrin-
DNAse I study that cuts DNA on either side of region being
studied. Produced highest band in both cells (neuronal and
BB88) at cut site
Bubble in elongation Correct Answers Open initiation complex
catabolite activation protien Correct Answers binds DNA and
also binds RNAP
cell specific responses to regulatory modules (example) Correct
Answers Myo blast (MYOD) = genes for muscles
mf-KB = immune cells
Chemical crosslinking Correct Answers amino acid in RNAP
connected to bases it attaches and shows how RNAP affects
things close to it
Coactivators Correct Answers proteins that increase the rate of
transcription but do not directly bind to the DNA itself, instead
they bind to other proteins
, coding strand Correct Answers the strand of DNA that is not
used for transcription and is identical in sequence to mRNA,
except it contains uracil instead of thymine
Constitutive control Correct Answers intrinsic fitness of
promoter (ex: its sequence)
fitness can vary 1000x fold
constitutive expression Correct Answers The genes are ON all
the time — they are expressed continuously, no matter whether
lactose is present or absent.
cross talk Correct Answers phenomenon of regulatory elements
affecting nearby genes
Delayed early transcripts Correct Answers encodes other genes
required for lytic and lysogenic cycle
derespression Correct Answers increase in expression
developmental responses to regulatory modules (example)
Correct Answers antennapedia
Diff DNA binding proteins Correct Answers 1. Helix-turn-helix
2. Homeodomain protiens
3. Ribbon Helix
4. Zinc-finger protiens
