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Part A Which of the following enzymes are directly involved in DNA repair mechanisms? 1. DNA...
Which DNA repair process begins with N-glycosylase reaction, followed by repair enzymes that excise one or...
Which DNA repair process begins with N-glycosylase reaction, followed by repair enzymes that excise one or more nucleotides at the abasic site? ► View Available Hint(s) mismatch repair systems O base excision repair O photoreactivation O Nucleotide excision repair Submit
1)Repairing damaged DNA is essential to maintaining the integrity of the genome. One type of repair...
1)Repairing damaged DNA is essential to maintaining the integrity of the genome. One type of repair is known as nucleotide excision repair. In this system, which order do the necessary enzymes act? A) exonuclease, DNA polymerase III, RNA primase B) helicase, DNA polymerase I, DNA ligase C) DNA ligase, nuclease, helicase D) DNA polymerase I, DNA polymerase III, DNA ligase E) endonuclease, DNA polymerase II, DNA ligase 2) What might be the result if all cells had functioning telomerase? A)...
Which of the following is/are false regarding radical mechanisms? i. Lone pairs are not directly involved...
Which of the following is/are false regarding radical mechanisms? i. Lone pairs are not directly involved in coordination ii. There are different activation energies for each SH2 step iii. Peroxides are the only chemical initiating source O i. only O i., ii., and iii. O ii. and iii. Oii. only
Part B Which of the following statements about DNA structure is true? View Available Hint(s) The...
Part B Which of the following statements about DNA structure is true? View Available Hint(s) The pentose sugar in DNA is ribose. O ooo Hydrogen bonds formed between the sugar.phosphate backbones of the two DNA chains help to stabilize DNA structure Nucleic acids are formed through phosphodiester bonds that link nucleosides together. The nucleic acid strands in a DNA molecule are oriented antiparallel to each other, meaning they run in opposite directions. Submit Part What is the complementary DNA sequence...
Outline the processes involved in the following five major classes of DNA repair systems: 1. Direct...
Outline the processes involved in the following five major classes of DNA repair systems: 1. Direct Repair 2. Base Excision repair 3. Nucleotide Excision Repair 4. Mismatch Repair 5. Bypass repair systems
1) When DNA is damaged, a cell has a variety of repair pathways available to correct...
1) When DNA is damaged, a cell has a variety of repair pathways available to correct the problem. Discuss their timing, anything they are good at detecting, and explain their specific mechanisms. A) 3pts - Mismatch repair: B) 3pts - Base excision [BER] repair: C) 3pts - Strand breakage repair – compare HRR [homologous recombination repair] and NREJ [non-recombination end joining] 2) 5pts - Discuss how an E. coli origin of replication is recognized [sequences?], opened [by dnaA], and...
Funcions of the After Cas9 cleaves the DNA, cellular enzymes will attempt to repair the break....
Funcions of the After Cas9 cleaves the DNA, cellular enzymes will attempt to repair the break. Most of the time, these enzymes repair the DNA without errors. However, Cas9 will keep cutting the DNA at the same location until an error is made. 7. DNA repair errors include losing or inserting random nucleotides at the cut site. Explain how these changes might inactivate a gene. PART 2: Inactivating Genes in Butterflies Robert Reed, a biologist at Cornell University, wanted to...
Identify the various types of DNA repair mechanisms known to counteract the effects of UV radiation....
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...
2 For each of the following DNA lesions, indicate which repair pathway would be most directly...
2 For each of the following DNA lesions, indicate which repair pathway would be most directly involved in repairing the damage. For this question, select the best answer for each. b. MMR 8-oxo-G G:T base pair cisplatin-induced interstrand crosslink a. BER C. NER d. HR e NHEJ _UV-induced 6-4 photoproduct (pyrimidine dimer) X-ray induced double strand break in a neuron collapsed replication fork _deamination-induced uracil
biochemistry 12 1.8 BCH2603/101/3/2020 The DNA polymerase involved in base excision repair is 1. DNA polymerase...
biochemistry
12 1.8 BCH2603/101/3/2020 The DNA polymerase involved in base excision repair is 1. DNA polymerase a 2. DNA polymerase B 3. DNA polymerase o 4. DNA polymerase v 5. DNA polymerase 1.9 Which of the following is true about phosphodiester linkage? 1.5 phosphate group of one nucleotide unit is joined to the 3-hydroxyl group of the next nucleotide 2.3-phosphate group of one nucleotide unit is joined to the 5-hydroxyl group of the next nucleotide De 0 DA
Which DNA repair process begins with N-glycosylase reaction, followed by repair enzymes that excise one or more nucleotides at the abasic site? ► View Available Hint(s) mismatch repair systems O base excision repair O photoreactivation O Nucleotide excision repair Submit
Which of the following is/are false regarding radical mechanisms? i. Lone pairs are not directly involved in coordination ii. There are different activation energies for each SH2 step iii. Peroxides are the only chemical initiating source O i. only O i., ii., and iii. O ii. and iii. Oii. only
Part B Which of the following statements about DNA structure is true? View Available Hint(s) The pentose sugar in DNA is ribose. O ooo Hydrogen bonds formed between the sugar.phosphate backbones of the two DNA chains help to stabilize DNA structure Nucleic acids are formed through phosphodiester bonds that link nucleosides together. The nucleic acid strands in a DNA molecule are oriented antiparallel to each other, meaning they run in opposite directions. Submit Part What is the complementary DNA sequence...
Funcions of the After Cas9 cleaves the DNA, cellular enzymes will attempt to repair the break. Most of the time, these enzymes repair the DNA without errors. However, Cas9 will keep cutting the DNA at the same location until an error is made. 7. DNA repair errors include losing or inserting random nucleotides at the cut site. Explain how these changes might inactivate a gene. PART 2: Inactivating Genes in Butterflies Robert Reed, a biologist at Cornell University, wanted to...
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...
2 For each of the following DNA lesions, indicate which repair pathway would be most directly involved in repairing the damage. For this question, select the best answer for each. b. MMR 8-oxo-G G:T base pair cisplatin-induced interstrand crosslink a. BER C. NER d. HR e NHEJ _UV-induced 6-4 photoproduct (pyrimidine dimer) X-ray induced double strand break in a neuron collapsed replication fork _deamination-induced uracil
biochemistry
12 1.8 BCH2603/101/3/2020 The DNA polymerase involved in base excision repair is 1. DNA polymerase a 2. DNA polymerase B 3. DNA polymerase o 4. DNA polymerase v 5. DNA polymerase 1.9 Which of the following is true about phosphodiester linkage? 1.5 phosphate group of one nucleotide unit is joined to the 3-hydroxyl group of the next nucleotide 2.3-phosphate group of one nucleotide unit is joined to the 5-hydroxyl group of the next nucleotide De 0 DA
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