1)________________________ is found within the transcription bubble. a) Positive supercoils in the DNA b) Negative supercoils...
1)________________________ is found within the transcription bubble.
a) Positive supercoils in the DNA
b) Negative supercoils in the DNA
c) An intact DNA duplex
d) A short DNA-RNA hybrid
2) The σ70 subunit of the E. coli RNA polymerase:
a) acts as the catalytic site for polymerization.
b) recognizes promoters.
c) has a proofreading function.
d) increases the processivity of the enzyme.
Homework Answers
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1)________________________ is found within the transcription
bubble.
a) Positive supercoils in the DNA
b) Negative supercoils...
1. The ribosome is important for catalyzing the formation of peptide bonds. Which of the following...
1. The ribosome is important for catalyzing the formation of peptide bonds. Which of the following statements is true? (a) The number of rRNA molecules that make up a ribosome greatly exceeds the number of protein molecules found in the ribosome. (b) The large subunit of the ribosome is important for binding to the mRNA. (c) The catalytic site for peptide bond formation is formed primarily from an rRNA. (d) Once the large and small subunits of the ribosome assemble,...
DNA polymerases are processed, which means that they remain tightly associated with the while moving rapidly...
DNA polymerases are processed, which means that they remain tightly associated with the while moving rapidly and adding nucleotides to the growing daughter strand. Which piece of the machinery accounts for this characteristic? (a) helicase (b) sliding elamp (c) single-strand binding protein (d) primase RNA in cells differs from in that _____ (A) it contains the base uracil, which pairs with cytosine (b) it is single stranded and cannot form base pairs (c) it is single stranded and can fold...
Which of these is involved in the transcription of tRNA genes? A. RNA Pol 1 B....
Which of these is involved in the transcription of tRNA genes? A. RNA Pol 1 B. RNA Pol 2 C.RNA Pol 3 D.RNA Pol 4 E. Not sure A promoter is.... A. Proteins that defines the beginning of a gene B. DNA elements that help define the beginning of a gene C. It is the DNA sequence at the start of a gene D. Not sure Promoters TATA Start site What is the TATA box? A. It's a DNA sequence...
1. Which of the following statements is FALSE? Helicase activity 'unwinds DNA making the double-stranded molecule...
1. Which of the following statements is FALSE? Helicase activity 'unwinds DNA making the double-stranded molecule into single strands. b. The leading strand of DNA is started by an RNA primer The lagging strand of DNA is synthesized as "Okazaki fragments", cach with its own RNA primer. DNA replication proceeds in both directions around the bacterial chromosome. DNA polymerase synthesives new DNA in one direction (3 to 5) only. 2. Which of the following would be found in eukaryotes? a....
QUESTION 1: You are inserting a gene into an MCS found within the LacZ gene. Using...
QUESTION 1: You are inserting a gene into an MCS found within the LacZ gene. Using blue/white colony selection, why could you assume that white colonies have modified plasmids? a. A blue colony means the LacZ reading-frame was disrupted b. A blue colony means your gene has mutations c. A white colony means the LacZ reading-frame is intact d. A white colony means the LacZ reading-frame was disrupted QUESTION 2: You are performing a PCR using primers with a sequence perfectly...
29. The initiator RNA attaches at the ribosome's site. A. A B. translocon C. E DP...
29. The initiator RNA attaches at the ribosome's site. A. A B. translocon C. E DP E. O 30. Which one of the following, if missing, would usually prevent translation from starting? A. one of several exons in a mRNA B. poly-A tail C. AUG codon D. spliceosome E. RNA polymerase 31. Which of the following statements about DNA synthesis is true? A. Nucleotides are added in a random fashion to single-stranded DNA. B. DNA polymerase adds dNTP monomers in...
Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic...
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...
The lac operon contains a DNA sequence known as the lac promoter (P or P+ for...
The lac operon contains a DNA sequence known as the lac promoter (P or P+ for wild type; P– for mutant (RNA polymerase does not bind)) that serves as the RNA polymerase binding site. The lac operon also contains a DNA sequence known as the Lac operator (O or O+ for wild type; O– or Oc for mutant (lac repressor cannot bind)) which is the binding site for lac repressor. The lac repressor, a protein, is encoded by the lac...
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!
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...
MUN for the rapid SA can be enormously benehciarlo NS FOR FURTHER REVIEW be found in...
MUN for the rapid SA can be enormously benehciarlo NS FOR FURTHER REVIEW be found in the answer section at the back wers only after you have attempted to solve th at the back of this d to solve the ques- Answers to these questions can be found in the study guide. Refer to the answers only after you tions ON JONr Own. Multiple Choice 1. DNA genomes are found in: a. All organisms and all viruses b. All organisms,...
DNA polymerases are processed, which means that they remain tightly associated with the while moving rapidly and adding nucleotides to the growing daughter strand. Which piece of the machinery accounts for this characteristic? (a) helicase (b) sliding elamp (c) single-strand binding protein (d) primase RNA in cells differs from in that _____ (A) it contains the base uracil, which pairs with cytosine (b) it is single stranded and cannot form base pairs (c) it is single stranded and can fold...
Which of these is involved in the transcription of tRNA genes? A. RNA Pol 1 B. RNA Pol 2 C.RNA Pol 3 D.RNA Pol 4 E. Not sure A promoter is.... A. Proteins that defines the beginning of a gene B. DNA elements that help define the beginning of a gene C. It is the DNA sequence at the start of a gene D. Not sure Promoters TATA Start site What is the TATA box? A. It's a DNA sequence...
1. Which of the following statements is FALSE? Helicase activity 'unwinds DNA making the double-stranded molecule into single strands. b. The leading strand of DNA is started by an RNA primer The lagging strand of DNA is synthesized as "Okazaki fragments", cach with its own RNA primer. DNA replication proceeds in both directions around the bacterial chromosome. DNA polymerase synthesives new DNA in one direction (3 to 5) only. 2. Which of the following would be found in eukaryotes? a....
29. The initiator RNA attaches at the ribosome's site. A. A B. translocon C. E DP E. O 30. Which one of the following, if missing, would usually prevent translation from starting? A. one of several exons in a mRNA B. poly-A tail C. AUG codon D. spliceosome E. RNA polymerase 31. Which of the following statements about DNA synthesis is true? A. Nucleotides are added in a random fashion to single-stranded DNA. B. DNA polymerase adds dNTP monomers in...
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...
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...
MUN for the rapid SA can be enormously benehciarlo NS FOR FURTHER REVIEW be found in the answer section at the back wers only after you have attempted to solve th at the back of this d to solve the ques- Answers to these questions can be found in the study guide. Refer to the answers only after you tions ON JONr Own. Multiple Choice 1. DNA genomes are found in: a. All organisms and all viruses b. All organisms,...
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