Methylation of dUMP produces _______ . a) dCTP b) dTMP c) dCMP d) dUTP
Methylation of dUMP produces _______ . a) dCTP b) dTMP c) dCMP d) dUTP
Homework Answers
Methylation of dUMP produces (b) dTMP
If you observe the mechanism we see that TS forms a covalent bond to the substrate dUMP through a 1,4-addition involving a cysteine nucleophile. The substrate tetrahydrofolate donates a methyl group to the alpha carbon, and reduces the new methyl on dUMP to form dTMP.
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Methylation of dUMP produces _______ . a) dCTP b) dTMP c) dCMP
d) dUTP
If you substituted the hydrogen atoms on the methylene moiety of the dUMP intermediate (indicated by...
If you substituted the hydrogen atoms on the methylene moiety of the dUMP intermediate (indicated by an asterisk) for a deuterium, what kind of isotope effect would you observe. H2N H2folate H2N Inverse secondary KIE HN CH2 H HN a. HN CH2 b. Normal secondary KIE он 0 0 H c. Inverse primary KIE d. Normal primary KIE CH HN 146 "О-Р-О 0 "О-Р-О- Cys146 он dTMP Он
ton is not an energy dependent process in (B)) Falls eukaryotes 43. Histone methylation is associated...
ton is not an energy dependent process in (B)) Falls eukaryotes 43. Histone methylation is associated with Falls gene activation gene silencing Following histones are required during transcription (A) H2A and 2B (B) H3 (C) H4 (D) All of the above (E) H2AZ (c) induction (D) All of the above (E) None of the above 35. 4. DNA methylation silences gene expression AD True (B) Fall Leucine residues in lucine zipper proteins provides h ydrophobic interaction for dimerization (A) True...
17-11. Methylation of eukaryotic DNA controls gene expression. a) Describe in words the control of methylation of DNA in eukaryotes. b) Describe in words how silencing starts with methylation.
17-11. Methylation of eukaryotic DNA controls gene expression. a) Describe in words the control of methylation of DNA in eukaryotes. b) Describe in words how silencing starts with methylation.
1- In addition to the DNA building blocks (nucleotides dATP, dCTP, dGTP, dTTP) the master mix...
1- In addition to the DNA building blocks (nucleotides dATP, dCTP, dGTP, dTTP) the master mix contain: A) Taq DNA polymerase B) Buffer C) Magnesium chloride D) Specific primers to amplify the BXPOO7 locus E) All of the above 2- PCR partially simulates ‘in vivo” A) RNA synthesis B) DNA transcription to RNA C) Protein synthesis D) DNA replication
Which of the following would prevent transcriptional activators from binding? A. Increased DNA methylation B. Increased...
Which of the following would prevent transcriptional activators from binding? A. Increased DNA methylation B. Increased nucleosome abundance C. BOTH (A) and (B) D. NEITHER (A) or (B)
QUESTION 5 In what way does DNA methylation typically regulate transcription? A. Represses transcription. B. Activates...
QUESTION 5 In what way does DNA methylation typically regulate transcription? A. Represses transcription. B. Activates transcription. O C. It doesn't regulate transcription at all. D. Both A and B.
Assume that the following single strand of DNA was synthesized using standard dATP, dGTP, dCTP, and...
Assume that the following single strand of DNA was synthesized using standard dATP, dGTP, dCTP, and dTTP precursors; however, the innermost phosphate (alpha phosphate) of all the dATPs was labeled with 32P. 3' - CTAGTAT - 5' Assume also that the strand was degraded to completion by the enzyme spleen diesterase. Spleen diesterase cleaves DNA at the covalent bond that connects the 5' carbon of the sugar to the phosphate. Which of the resulting nucleotide(s) might now carry the 32P?...
What would be the expected outcome of a mutation in E.coli that prevented methylation of adenine...
What would be the expected outcome of a mutation in E.coli that prevented methylation of adenine in the sequence 5'-GATC-3'? A) loss of epigenetic markers B) Randomization of mismatch repair C) increased mutation rate D) B and C E) All of these
Two identical twins who showed very similar methylation patterns when they were 4 years old show...
Two identical twins who showed very similar methylation patterns when they were 4 years old show very divergent patterns at age 40. This divergence is most likely due to a different alternative splicing in the two individuals Ob different levels of histone acetyltransferase in the two individuals. Oc environmental differences that they experienced as adults. O d. different genomic imprinting in the two individuals. O e differences in their experiences in utero Suppose that a certain enzyme is synthesized whenever...
Alterations of chromatin of DNA structure that are stable and inheritable in offspring via DNA methylation...
Alterations of chromatin of DNA structure that are stable and inheritable in offspring via DNA methylation or alteration of histone proteins is referred to as _____ changes. A. epigenetic B. sensitivity C. mutational D. genetic
If you substituted the hydrogen atoms on the methylene moiety of the dUMP intermediate (indicated by an asterisk) for a deuterium, what kind of isotope effect would you observe. H2N H2folate H2N Inverse secondary KIE HN CH2 H HN a. HN CH2 b. Normal secondary KIE он 0 0 H c. Inverse primary KIE d. Normal primary KIE CH HN 146 "О-Р-О 0 "О-Р-О- Cys146 он dTMP Он
ton is not an energy dependent process in (B)) Falls eukaryotes 43. Histone methylation is associated with Falls gene activation gene silencing Following histones are required during transcription (A) H2A and 2B (B) H3 (C) H4 (D) All of the above (E) H2AZ (c) induction (D) All of the above (E) None of the above 35. 4. DNA methylation silences gene expression AD True (B) Fall Leucine residues in lucine zipper proteins provides h ydrophobic interaction for dimerization (A) True...
QUESTION 5 In what way does DNA methylation typically regulate transcription? A. Represses transcription. B. Activates transcription. O C. It doesn't regulate transcription at all. D. Both A and B.
Two identical twins who showed very similar methylation patterns when they were 4 years old show very divergent patterns at age 40. This divergence is most likely due to a different alternative splicing in the two individuals Ob different levels of histone acetyltransferase in the two individuals. Oc environmental differences that they experienced as adults. O d. different genomic imprinting in the two individuals. O e differences in their experiences in utero Suppose that a certain enzyme is synthesized whenever...
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