NESTER'S MICROBIOLOGY-CONNECT >CUSTOM<
9th Edition
ISBN: 9781265432287
Author: Anderson
Publisher: MCG CUSTOM
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Textbook Question
Chapter 8, Problem 4MC
Mechanisms that repair errors in
1)mismatch repair.
2)proofreading by DNA polymerase.
3)light repair.
4)SOS repair.
5)excision repair.
a) 1, 2
b) 2, 3
c) 3, 4
d) 4, 5
e) 1, 5
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Double-stranded breaks are repaired by
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homologous recombinational repair.
b)
translesion repair.
c)
direct reversal of DNA damage
The wrong nucleotide is occasionally incorporated during DNA replication and not immediately repaired by the proofreading function of DNA polymerase. Which of the following DNA repair systems relies upon methylated DNA to determine which base is correct and which needs to be repaired?a) CPD photolyase repair
b) mismatch repairc) nucleotide-excision repair d) base-excision repaire) homology-directed repair
The Drug AZT is used to treat AIDS, This drug is a _____ Inhibitor/Activator of _____
a) Competitive; Activator; DNA polymerase
b) Noncompetitive; Inhibitor; DNA polymerase
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Chapter 8 Solutions
NESTER'S MICROBIOLOGY-CONNECT >CUSTOM<
Ch. 8 - Prob. 1SACh. 8 - Why is deleting one nucleotide generally more...Ch. 8 -
3. What type of mutation in an operon is most...Ch. 8 -
4. What is meant by "proofreading" with respect...Ch. 8 - Why would a cell use SOS repair, considering that...Ch. 8 - Why is replica plating used to isolate an...Ch. 8 - What is transduction?Ch. 8 -
8. How is an F+ strain different from an Hfr...Ch. 8 - Name four mobile genetic elements.Ch. 8 - Why are R plasmids important?
Ch. 8 - UV light exposure forms a) covalent bonds between...Ch. 8 -
2. If cells were exposed to UV light, the highest...Ch. 8 -
3. Penicillin enrichment of mutants works on the...Ch. 8 -
4. Mechanisms that repair errors in nucleotide...Ch. 8 -
5. You are trying to isolate a mutant of...Ch. 8 -
6. All plasmids
1) carry genes for antimicrobial...Ch. 8 -
7. Adding DNase to a mixture of donor and...Ch. 8 -
8. An F pilus or its equivalent is essential...Ch. 8 - A plasmid that can replicate in E. coli and...Ch. 8 -
10. The frequency of transfer of an F' molecule...Ch. 8 -
1. Some bacteria may have higher mutation rates...Ch. 8 -
2. A pharmaceutical researcher is disturbed to...Ch. 8 - Prob. 1CTCh. 8 -
2. You have isolated a strain of E. coli that is...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Double-stranded breaks are repaired by: a). direct reversal of DNA damage b). recombinational repair c). translesion repairarrow_forwardChemical mutagens often cause oxidation or deamination of DNA bases. This can lead to cancer by causing: A) Activation of replication. B) Activation of transcription. C) Non Watson-Crick base pairing. OD) Changes to cytochrome P450 enzymes. OE) Activation of translation.arrow_forwardWhich of the following mechanisms will remove uracil and incorporate the correct base? a) Nucleotide excision repair b) Direct repair c) Base excision repair d) Mismatch repairarrow_forward
- A DNA polymerase enzyme inherently incorporates an incorrect nucleotide at a low but measurable rate. Such a mutation is termed _______. A) spontaneous B) lysogenic C) transformative D) transductive E) inducedarrow_forwardA cytosine is deaminated, forming uracil. Which DNA repair systems is best able to correct this error?a) CPD photolyase repairb) mismatch repair c) nucleotide-excision repair d) base-excision repaire) homology-directed repairarrow_forwardThe transposase enzyme is essential for transposition because A) It can recognize the end of the DNA transposable elements B) It can cut the DNA strands C) It can copy the transposable elements into RNA D) A and B E) A, B and Carrow_forward
- 27) If the sequence TCGTA was used as a template in DNA replication, what would the sequence of bases be on the newly synthesized strand? A) TCGTA C) CTACG D) GCATC E) ATCCT B) AGCATarrow_forwardWhich replication enzyme(s) is/are responsible for synthesizing new DNA components: A) Ligase B) DNA Polymerase C) RNA Polymerase D) Ligase & DNA Polymerase E) RNA Polymerase & DNA Polymerase F) None of these.arrow_forwardA single DNA molecule contains two specific target sites separated by an intervening sequence. If site-specific recombination between these sites causes the intervening sequence to be released as a separate circular DNA molecule containing one target site, then the sites were oriented in A) opposite directions causing excision. B) the same direction causing excision. C) opposite directions causing integration. D) the same direction causing integration. E) the same direction causing inversion.arrow_forward
- Which of the following mechanisms will remove uracil and incorporate the correct base?a) Direct repairb) Base excision repairc) Mismatch repaird) Nucleotide excision repairarrow_forward18) UV radiation damages DNA by causing... a) frame-shift mutations b) base substitutions c) bonds between neighboring Thymine bases - "thymine dimers" d) unzipping of the DNA molecue e) all of thesearrow_forwardWhich of the following enzyme is responsible for making a DNA copy from RNA?a) Reverse transcriptaseb) DNA polymerasec) RNA polId) RNA polIIarrow_forward
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