Correct option is : • (E) Mismatch repair : recognize a DNA mismatch distortion in the DNA
[ Mismatch repair happens right after new DNA has been made, and its job is to remove and replace mis-paired bases (ones that were not fixed during proofreading). Mismatch repair can also detect and correct small insertions and deletions that happen when the polymerases "slips," losing its footing on the template.]
Which DNA repair mechanism fixes DNA directly after DNA synthesis? How does it detect an error...
Which of the examples listed is not a DNA repair mechanism? direct repair base‑excision repair nucleotide‑excision repair insertion sequence repair mismatch repair
Mismatch repair requires all of the following EXCEPT: Requires information from a nearby homologous chromosome Uses information on the parental strand to identify the error. Is tightly associated with new replicated DNA Makes use of ligase. Requires the use of a repair DNA polymerase. Question 12 Which of the following is NOT necessary for homologous recombination to occur? O nucleases 5' DNA strand overhangs 3' DNA strand overhangs ligase a long stretch of sequence similarity Which of the following apply...
Identify the various types of DNA repair mechanisms known to counteract the effects of UV radiation. Recombinational repair Excision repair Photoactivation repair SOS repair 1. is dependent on a photon-activated enzyme that cleaves thymine dimers. 2. is the process by which an endonuclease clips out UV- induced dimers, DNA polymerase III fills in the gap, and DNA ligase rejoins the phosphodiester backbone. 3. uses the corresponding region on the undamaged parental strand of the same polarity. 4. is a process...
A) Which property of DNA replication enables accurate mismatch repair to prevent mutation? a) Adenine methylase lags behind the DNA polymerase b) the proofreading ability of DNA polymerase c) the error-free nature of DNA pol. III d) the sister chromatid can be used as a template B) which DNA repair mechanism uses the sister chromatid as a template for repair? a) nucleotide excision repair b) double-stranded break repair c) postreplication repair d) base excision repair C) indicate which substitutions require...
How does the DNA repair mechanism distinguish the old strand from the new strand shortly after replication? A. the old strand is methylated while the new strand is not B. the old strand will contain thymine while the new strand contains uracil C. the new strand is methylated while the old strand is not D. the new strand has amino acids instead of nucleotides
QUESTION 11 does not require supplemental histidine). True or False: Using the Ames test, a compound is determined to be mutagenic if it causes a His bacterial strain (requires histidine in the growth medium) to become His O True False QUESTION 12 Xeroderma pigmentosa (XP): is caused by a defect in the mismatch repair system. O typically results in base substitution mutations. can be caused by defects in any of a number of different genes that have to do with...
Question 4 4 pts Which statement best describes mismatch repair mechanism uracile glcosylase is part of this mechanism. An light-dependent enzyme is involved. can couple with homologous recombination to repair DS break Deamination is the cause of this DNA damage.
1.Which of the following DNA repair systems involving DNA N-glycosylasesrecognizes an abnormal DNA nucleotide (i.e. uracil) and cleaves the bond between it and the sugar? - Mismatch repair -Base excision repair -Non-homologous end-joining repair -Homologous recombination repair 2. self-splicing is the most common mechanism for splicing mRNA transcribed from eukaryotic, nuclear, structural genes - true or false 3. True or False, during elongation of transcription, RNA polymerase is primarily in a closed complex
In non-error prone DNA repair which of the following is usually the initial step in repairing a damage base: A. Excision of a small region around the damaged base. B. The binding of a sensor protein to the damaged region of DNA. C. The re-synthesis of the removed segment of DNA by DNA polymerase. D. The integrity of the resynthesized sugar-phosphate backbone is restored by ligase. E. None of the answers listed above (ABCD) are correct.
1. Which repair mechanism is most likely affected if the enzyme DNA glycosylase is not functioning properly? photoreactivation repair base excision repair SOS repair double-strand break repair nucleotide excision repair 2. In bacteria and eukaryotes, a mutation is when ________. In bacteria and eukaryotes, a mutation is when ________. A.the nucleotide sequence in an mRNA molecule is directly changed B.the nucleotide sequence in a DNA molecule is directly changed C.the amino acid sequence in a protein molecule is directly changed...