Discuss the following statement: The DNA repair enzymes that correct damage introduced by deamination and depurination...
Discuss the following statement: The DNA repair enzymes that correct damage introduced by deamination and depurination must preferentially recognize such defects on newly synthesized strands.
Homework Answers
DNA damage by deamination and depurination reactions occur spontaneously . This type of damage is equally likely to occur on either strand and these damages are not the result of an replication errors. If the DNA repair enzymes recognized damages only on the newly synthesized DNA strands half of the defects would go uncorrected. Therefore the statement is incorrect.
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Discuss the following statement: The DNA repair enzymes that
correct damage introduced by deamination and depurination...
DNA mismatch repair enzymes preferentially repair bases on the newly synthesized DNA strand, using the old...
DNA mismatch repair enzymes preferentially repair bases on the newly synthesized DNA strand, using the old DNA strand as the template. If mismatches were simply repaired without regard for which strand served as template, would this reduce replication errors? Explain your answer (5 pts) Describe DNA replication (remember to mention all the enzymes involved) (10 pts)
Question 1 1 pts Primase is accurate than DNA polymerase at copying a DNA template. more...
Question 1 1 pts Primase is accurate than DNA polymerase at copying a DNA template. more less Question 2 1 pts J is a common type of DNA damage that, if not repaired, can lead to the loss of a nucleotide and possibly a shift in the reading frame. Depurination Deamination Question 3 1 pts Each time the genome is replicated, half the newly synthesized DNA is stitched together from Okazaki fragments. True False Question 4 1 pts The complement...
Which statement is correct about DNA mutation and DNA repair? A. DNA mutation always leads to...
Which statement is correct about DNA mutation and DNA repair? A. DNA mutation always leads to an impaired protein function A Question Progress A B. All organisms have elaborate mechanisms to repair DNA damage C. DNA mutation is a temporary change in DNA sequence D. Environmental mutagens are safe and won't cause cancer E. Homologous recombination is a type of genetic recombination in which nucleotide sequences are exchanged between two totally different molecules of DNA Reset Selection
Part A Which of the following enzymes are directly involved in DNA repair mechanisms? 1. DNA...
Part A Which of the following enzymes are directly involved in DNA repair mechanisms? 1. DNA photolyase 2. Oº-alkylguanine alkyltransferase 3. excinucleases 4. helicase II ► View Available Hint(s) All of the listed choices are repair mechanisms. 1, 2, and 4 are repair mechanisms. 0 1 and 2 are repair mechanisms. Only 1 through 3 are DNA repair mechanisms. Submit
Which of the following is true regarding DNA replication (see Chapter 16 in the textbook). Check...
Which of the following is true regarding DNA replication (see Chapter 16 in the textbook). Check all that are correct. Question options: A) DNA ligase joins Okazaki fragments on the lagging strand. B) DNA replication results in one double helix with all parental strand and one double helix with completely newly synthesized DNA. C) Nucleases add RNA primers to start replication. D) DNA replication starts at multiple points along the eukaryotic genome. E) Helicases prevent separation of the DNA strands...
Only answers please don’t show work 33) Viral DNA incorporated into host cell DNA is known...
Only answers please don’t show work
33) Viral DNA incorporated into host cell DNA is known as a/an A) phage. B) envelope C) capsid. 33) 34) How is transformation in bacteria most A) the creation of a strand of RNA from DNA molecule B) the type of semiconservative by DNA C) the infection of cells by a phage DNA molecule D) the e of a strand of DNA from an RNA molecule E) assimilation of external DNA into a cell...
can you guys please give me the correct answers and explain why? 3. Which of the...
can you guys please give me the correct answers and explain
why?
3. Which of the following statements is CORRECT? A. Exposure of E.coli to UV light greatly increases the frequency of cytosine deamination B. Mutagens that intercalate into the double helix lead to the formation of thymine dimers. C) Oxidative damage to DNA usually leads to the formation of frameshift mutations. D. Some alkylating agents are mutagenic because they chemically modify amino acids in the active site of DNA...
Please answer 54, 55, 61,62,64,66,70,72,82,83 on the facs that newly replicated DNA strands are ethylated relative...
Please answer 54, 55, 61,62,64,66,70,72,82,83
on the facs that newly replicated DNA strands are ethylated relative to older DNA 54, Ir used u ished to study the SOS response in Escherichi col, which of the following esperimental procodures could b A.All ofthe choices are correct Expoe cells to nonionising radiation for 20 es C. Espose cells to soniring radiation for 10 minutes Transfer log phase cells frees complete medium to thymine minimal medium What wouild be the hypothetical outcome if...
Question 33 2 pts Which of the following statements about the process of DNA replication is...
Question 33 2 pts Which of the following statements about the process of DNA replication is true? It involves the enzyme DNA ligase, which corrects point mutations. It utilizes DNA polymerase, which catalyzes the reaction that adds a new nucleotide to the growing strand. The sequence on the new strand is always identical to one of the old parent strands. Adenine pairs with guanine, and cytosine pairs with thymine. Question 34 2 pts The DNA base...
DNA DNA Replication: ONA Because DNA Is the ge m Tumes and heart e ine in...
DNA DNA Replication: ONA Because DNA Is the ge m Tumes and heart e ine in process called DNA curs in the nucleus of s acest FS Parent strand Parent strand Newly replicated DNA Newly replicated DNA- SA0 Daughter DNA molecule Daughter DNA molecule Figure 8.2: Overview of DNA replication and illustration of complementary base pairing. DNA must replicate before cell division so that each new daughter cell receives an exact copy of the parent DNA. 1. Replication begins when...
DNA mismatch repair enzymes preferentially repair bases on the newly synthesized DNA strand, using the old DNA strand as the template. If mismatches were simply repaired without regard for which strand served as template, would this reduce replication errors? Explain your answer (5 pts) Describe DNA replication (remember to mention all the enzymes involved) (10 pts)
Question 1 1 pts Primase is accurate than DNA polymerase at copying a DNA template. more less Question 2 1 pts J is a common type of DNA damage that, if not repaired, can lead to the loss of a nucleotide and possibly a shift in the reading frame. Depurination Deamination Question 3 1 pts Each time the genome is replicated, half the newly synthesized DNA is stitched together from Okazaki fragments. True False Question 4 1 pts The complement...
Which statement is correct about DNA mutation and DNA repair? A. DNA mutation always leads to an impaired protein function A Question Progress A B. All organisms have elaborate mechanisms to repair DNA damage C. DNA mutation is a temporary change in DNA sequence D. Environmental mutagens are safe and won't cause cancer E. Homologous recombination is a type of genetic recombination in which nucleotide sequences are exchanged between two totally different molecules of DNA Reset Selection
Part A Which of the following enzymes are directly involved in DNA repair mechanisms? 1. DNA photolyase 2. Oº-alkylguanine alkyltransferase 3. excinucleases 4. helicase II ► View Available Hint(s) All of the listed choices are repair mechanisms. 1, 2, and 4 are repair mechanisms. 0 1 and 2 are repair mechanisms. Only 1 through 3 are DNA repair mechanisms. Submit
Only answers please don’t show work
33) Viral DNA incorporated into host cell DNA is known as a/an A) phage. B) envelope C) capsid. 33) 34) How is transformation in bacteria most A) the creation of a strand of RNA from DNA molecule B) the type of semiconservative by DNA C) the infection of cells by a phage DNA molecule D) the e of a strand of DNA from an RNA molecule E) assimilation of external DNA into a cell...
can you guys please give me the correct answers and explain
why?
3. Which of the following statements is CORRECT? A. Exposure of E.coli to UV light greatly increases the frequency of cytosine deamination B. Mutagens that intercalate into the double helix lead to the formation of thymine dimers. C) Oxidative damage to DNA usually leads to the formation of frameshift mutations. D. Some alkylating agents are mutagenic because they chemically modify amino acids in the active site of DNA...
Please answer 54, 55, 61,62,64,66,70,72,82,83
on the facs that newly replicated DNA strands are ethylated relative to older DNA 54, Ir used u ished to study the SOS response in Escherichi col, which of the following esperimental procodures could b A.All ofthe choices are correct Expoe cells to nonionising radiation for 20 es C. Espose cells to soniring radiation for 10 minutes Transfer log phase cells frees complete medium to thymine minimal medium What wouild be the hypothetical outcome if...
DNA DNA Replication: ONA Because DNA Is the ge m Tumes and heart e ine in process called DNA curs in the nucleus of s acest FS Parent strand Parent strand Newly replicated DNA Newly replicated DNA- SA0 Daughter DNA molecule Daughter DNA molecule Figure 8.2: Overview of DNA replication and illustration of complementary base pairing. DNA must replicate before cell division so that each new daughter cell receives an exact copy of the parent DNA. 1. Replication begins when...
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