How is the mechanism by which eukaryotic repressors function different from that by which prokaryotic repressors...
How is the mechanism by which eukaryotic repressors function different from that by which prokaryotic repressors function?
1. Bacterial repressors bind to operators and RNA polymerase simultaneously, inhibiting polymerase activity.
2. Eukaryotic repressors bind to silencers and RNA polymerase simultaneously, inhibiting polymerase activity.
3. Bacterial repressors directly block RNA polymerase from binding to the promoter.
4. Eukaryotic repressors directly block RNA polymerase from binding to the promoter.
5. The mechanisms of bacterial repressors and eukaryotic repressors and highly conserved and do not differ at all.
**I chose 4 and got it wrong
Homework Answers
Answer 3. Bacterial repressors directly block RNA polymerase from binding to the promoter.
Prokaryotic RNA polymerase action has been characterized by binding of the enzyme to the promoter to form a closed complex, melting of the DNA to form the open complex.
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How is the mechanism by which eukaryotic repressors function
different from that by which prokaryotic repressors...
Identify each description as typical of eukaryotic repressors or bacterial repressors. Leave unplaced the description that...
Identify each description as typical of eukaryotic repressors or bacterial repressors. Leave unplaced the description that is not characteristic of either group. binds to DNA-binding motifs on RNA polymerase and directly inhibits it binds to a silencer that uses transcriptional activator proteins to block RNA polymerase binds to an operator downstream of the promoter site and blocks RNA polymerase
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3. Prokaryotic and eukaryotic gene expression compared. Below is an incomplete table of prokaryotic and eukaryotic...
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Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic RNA usually undergoes nuclear processing C. Polypeptides are synthesized by addition of amino acids to the amino terminus. D. The 3' end of mRNA corresponds to the carboxyl terminus of the protein. Grade 2. Which of the following A. It may be autocatalytic. B. Spliceosomes are present in organelles and nuclei C. It involves removal of exons is true regarding RNA processing? D. It...
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2.) Activator and helper. Figure 19.29B gives the fold change for a genetic network with an...
2.) Activator and helper. Figure 19.29B gives the fold change
for a genetic network with an activator and helper. However, it
contains several mistakes that we will fix here.
a.) Derive the formula for the fold change under the assumptions
of a weak promoter and �!"# $% ≫ �. Show that the fold change is
given by the formula below rather than that in the book. Hint: The
schematic in Figure 19.29B should be helpful in determining the
states and...
Microbiology study guide questions. Please Help! s. which of the following statements about water activity is not true? a) many fungi can tolerate aw levels of 07-0.8 b) many microorganisms grow...
Microbiology study guide questions. Please Help!
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Need help filling in the chart and answering the questions
that go along with it. I have added the procedure and the
instructions as well as the "results" that are supposed to be used
to fill in the chart. Thank you!
We were unable to transcribe this imageTABLE 8-1 Cast of Characters and a Legend of Abbreviations Name Symbol Function in This Experiment Green fluorescent protein GFP It serves as an indicator of successful transformation and gene transcription expression in...
Identify each description as typical of eukaryotic repressors or bacterial repressors. Leave unplaced the description that is not characteristic of either group. binds to DNA-binding motifs on RNA polymerase and directly inhibits it binds to a silencer that uses transcriptional activator proteins to block RNA polymerase binds to an operator downstream of the promoter site and blocks RNA polymerase
3. Prokaryotic and eukaryotic gene expression compared. Below is an incomplete table of prokaryotic and eukaryotic gene expression in comparison. Fill in the blank using PPT slides, notes and the textbook. Prokaryotic gene expression Eukaryotic gene expression Overview Steps Transcription and translation Yes Transcription and translation coupled? Gene structure No introns Epigenetic modification (chromosome remodeling) transcription, translation, RNA processing, protein processing Transcription in the nucleus and translation in the cytoplasm Interrupted gene with exons and introns RNAPI, II, III Which...
Prokaryotic mRNA usually encodes for more than one protein while eukaryotic mRNA a single protein. Eukaryotic DNA is linear and bacterial and archaeal DNA is-linear. In prokaryotes, ribosomes attach to the mRNA and start protein synthesis even before transcription is completed. Eukaryotic mRNA, rRNA, and tRNA are all highway processed. Nuclear pore complexes control the entry and exit to and from the nucleus. They will not let mRNA exit the nucleus before it is full processed. Eukaryotic and archaeal DNA...
Which of the following is NOT a function of transcription that requires the activity from subunits of the Core RNA Palymerase? a. RNA polymerase activity that base-pairs and polymerizes nucleotides to make mRNA. b. Helicase activity that unwinds the double-stranded DNA molecule for transcription c. Specific recognition of -35 box and -10 box sites in the promoter region. d. General binding that helps RNA polymerase loosely adhere to DNA, before Transcription begins. Oe. Trick Question. The Core RNA polymerase can...
Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic RNA usually undergoes nuclear processing C. Polypeptides are synthesized by addition of amino acids to the amino terminus. D. The 3' end of mRNA corresponds to the carboxyl terminus of the protein. Grade 2. Which of the following A. It may be autocatalytic. B. Spliceosomes are present in organelles and nuclei C. It involves removal of exons is true regarding RNA processing? D. It...
please tell me which one I got worng
Depurination involves the removal of a purine (G or A) from the DNA there's a 75% chance of a mutation Covalent bond between deoxyribose and a purine base is somewhat unstable a and b a and all of the above are correct Huntington's Disease caused by TNRE As # of (CAG) repeats increases (above 36), the rate of deterioration of mental and physical abilities increases is a genetic phenomenon called anticipation all...
2.) Activator and helper. Figure 19.29B gives the fold change
for a genetic network with an activator and helper. However, it
contains several mistakes that we will fix here.
a.) Derive the formula for the fold change under the assumptions
of a weak promoter and �!"# $% ≫ �. Show that the fold change is
given by the formula below rather than that in the book. Hint: The
schematic in Figure 19.29B should be helpful in determining the
states and...
Microbiology study guide questions. Please Help!
s. which of the following statements about water activity is not true? a) many fungi can tolerate aw levels of 07-0.8 b) many microorganisms grow well at an aw of 0.98 e sear water has an aw of 0.98 e-xerephiles thrive in dry conditions DNA typically becomes disordered below an a of o.90 Which of the following descriptions about ribosome structure is not true? a) 80s is the size of the intact functional ribosome...
Need help filling in the chart and answering the questions
that go along with it. I have added the procedure and the
instructions as well as the "results" that are supposed to be used
to fill in the chart. Thank you!
We were unable to transcribe this imageTABLE 8-1 Cast of Characters and a Legend of Abbreviations Name Symbol Function in This Experiment Green fluorescent protein GFP It serves as an indicator of successful transformation and gene transcription expression in...
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