3. Explain how bacteria know which DNA strand is new and should be repaired should a...
3. Explain how bacteria know which DNA strand is new and should be repaired should a mutation occur
Homework Answers
Answer 3)
There is found methylation at the parental strand. That's why the parental strand is recognised from the newly synthesized strand on the basis of the methylation. This methylation is done by methylases enzyme. That's why the parental or old strand is protected from the action of repairing mechanism.
And in newly synthesized strand, this methylation is not found. And the repairing enzym can work on this strand and cure the mutation if found in this strand.
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3. Explain how bacteria know which DNA strand is new and
should be repaired should a...
Normally, DNA polymerase III proofreads as it synthesizes a new strand. If it misses an error...
Normally, DNA polymerase III proofreads as it synthesizes a new strand. If it misses an error and adds an incorrect base to a new strand, what is the consequence? This is a mutation and would be repaired by ligase because cells cannot have mutations that are uncorrected. This is a mutation and would result in the death of the cell that contains it. This is a mutation and would be inherited by cells that receive copies made from the altered...
*Template Strand of DNA 3. The following shows the first portion of a DNA strand of...
*Template Strand of DNA 3. The following shows the first portion of a DNA strand of a gene that is 2,500 base pairs long. AUG TACȚTCCCGGAGCCC--- TAAG LLL ODRAL a. What is the amino acid sequence encoded for by this strand starting with the T nucleotide on the left? Met b. Give an example of a synonymous substitution (a silent mutation) that could occur in the second codon of the DNA strand. c. Give an example of a nonsense mutation...
If DNA polymerase adds a G across from an 'A' in the template strand during DNA replication
If DNA polymerase adds a G across from an 'A' in the template strand during DNA replication (and it is not repaired/replaced), what kind of mutation results after the next round of replication? Briefly explain
the options are : leading strand, 5’end of new DNA strand, 3’ end of new DNA...
the options are : leading strand, 5’end of new DNA strand, 3’
end of new DNA strand, 5´end of parentsl DNA strand, RNA primer, 3’
end of parental DNA strand, RNA transcript, lagging strand and
DNA.
The image below shows DNA replication; certain parts of the image are labelled with letters. Match the letter to its correct will be used). B. 5' end of parental DNA strand 3' end of parental DNA strand leading strand RNA primer
Both the leading strand and lagging strand in replication synthesize a new strand of DNA but...
Both the leading strand and lagging strand in replication synthesize a new strand of DNA but explain how each strand is made. Make sure to include important enzymes like ligase, helicase, topoisomerase, DNA polymerase III/I, and primase.
How does homologous recombination of new bacteria DNA occur?
How does homologous recombination of new bacteria DNA occur?
1) The DNA template is read in the ______ direction, and the new strand is synthesized...
1) The DNA template is read in the ______ direction, and the new strand is synthesized in the ____ direction. A) 5' to 3' ; 3' to 5' B) 5' to 3' ; 5' to 3' C) 3' to 5' ; 5' to 3' D) 3' to 5' ; 3' to 5' 2) If a sequence of DNA is 5' AATTGCCGT 3', the complementary strand would be A) 3' AAAACGCCA 5' B) 3' TTAACGGCT 5' C) 5' ACGGCAATT 3' D)...
1. A mutation in the gene for DNA ligase will impact which strand during DNA replication...
1. A mutation in the gene for DNA ligase will impact which strand during DNA replication a. The leading b. The laggingc. Both the leading and the lagging d. Neither the leading strand or the lagging strand
describe how the Methyl-directed mismatch repair system in E. coli which DNA strand is the correct...
describe how the Methyl-directed mismatch repair system in E. coli which DNA strand is the correct strand and determines which DNA strand has the mutation. describe how DNA methylation is heritable during replication how epigenetic modifications are involved in genomic imprinting, X-inactivation, and regulation of tissue/cell specific gene expression (including the general roles of TrxG and PcG group proteins). ***Are these heritable during mitosis or meiosis? Are these reversible? Can you support your answer?
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)
*Template Strand of DNA 3. The following shows the first portion of a DNA strand of a gene that is 2,500 base pairs long. AUG TACȚTCCCGGAGCCC--- TAAG LLL ODRAL a. What is the amino acid sequence encoded for by this strand starting with the T nucleotide on the left? Met b. Give an example of a synonymous substitution (a silent mutation) that could occur in the second codon of the DNA strand. c. Give an example of a nonsense mutation...
the options are : leading strand, 5’end of new DNA strand, 3’
end of new DNA strand, 5´end of parentsl DNA strand, RNA primer, 3’
end of parental DNA strand, RNA transcript, lagging strand and
DNA.
The image below shows DNA replication; certain parts of the image are labelled with letters. Match the letter to its correct will be used). B. 5' end of parental DNA strand 3' end of parental DNA strand leading strand RNA primer
1. A mutation in the gene for DNA ligase will impact which strand during DNA replication a. The leading b. The laggingc. Both the leading and the lagging d. Neither the leading strand or the lagging strand
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)
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