Dna methylation Study guides, Class notes & Summaries
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USMLE Step 1- Biochemistry Questions and Answers(2022)Answered test
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USMLE Step 1- Biochemistry Questions and Answers(2022)Answered test 
 
 
 
Histones are rich in which 2 amino acids? Ans- Lysine 
Arginine 
 
What histone protein is responsible for binding to the nucleosome and to the "linker" DNA thereby stabilizing the chromatin fiber? Ans- H1 
 
When does DNA and histone synthesis occur in the cell cycle? Ans- S-phase 
 
Will the following be increased or decreased or neutral in heterochromatin? 
 
methylation 
acetylation Ans- methylation increased 
acety...
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USMLE Biochemistry Exam Questions with Correct Answers
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USMLE Biochemistry Exam Questions with Correct Answers 
 
Heterochromatin - ANSWER Highly Condensed DNA 
Transcriptionally inactive 
Ex. Barr bodies (inactivated X chromosomes) 
 
Euchromatin - ANSWER Less condensed DNA 
Transcriptionally active 
 
DNA Methylation - ANSWER Occurs at *CpG Islands* to repress transcription 
'CpG Methylation Makes DNA MUTE' 
 
Template strand *cytosine* and *adenine* are methylated, which allow mismatch repair enzymes to distingu...
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ETS MAJOR FIELD TEST IN BIOLOGY 2024 QUESTIONS WITH CORRECT ANSWERS ALREADY PASSED AND VERIFIED
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Pyrimidine dimers formed in DNA due to UV radiation can be repaired by? 
SOS repair 
Double strand break repair 
Mismatch repair 
Photoreactivation repair (nucleotide excision repair) 
Base excision repair - CORRECT ANSWER Photoreactivation repair (nucleotide excision repair) 
Which of the following repair mechanisms uses methyl groups to distinguish between parental and daughter strands? 
 
Answers: 
Mismatch repair 
Photoreactivation repair (Nucleotide excision repair) 
SOS repair 
Doub...
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(MB) ASCP Practice Exam 2023/2024 -150 Questions and Answers
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(MB) ASCP Practice Exam 2023/2024 150 Questions and Answers 
Which of the following is not a component of a nucleotide? 
Phosphate group 
Anti-codon 
Ribose sugar 
Nitrogen base - correct answers Anti-codon 
According to Chargaff's rule of base pairing, adenine pairs with: - correct answers Thymine 
What genes would be screened in a breast cancer panel? - correct answers HER2, ERBB2, 
BRCA1 
Next Generation Sequencing uses: - correct answers Short sequence reads 
Purines and pyrimidines differ ...
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NR 546 Midterm Exam 2023/2024 Questions AND Answers Update A+
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NR 546 Midterm Exam 
2023/2024 Questions AND 
Answers Update A+ 
What should the PMHNP consider when prescribing chemical restraints? - Answer-- 
allergy status 
-prior med hx for adverse drug reactions r/t the meds ordered in the chemical restraint 
-state regulations regarding chemical restrains must be reviewed 
Are the PMHNP and other staff liable if the client has an allergic reaction or adverse 
side effects to the drugs used for chemical restraint? - Answer-No. 
The client has been court-...
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NR507 Midterm Test Questions with Complete Solutions
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NR507 Midterm Test Questions with Complete Solutions 
 
What is epigenetics? - ANSWER The study of heritable changes in gene expression or phenotype casued by mechanisms *other* than changes in DNA sequences. 
 
DNA methylation - ANSWER The attachment of a methyl group to a cytosine base is followed by a guanine base...causes a gene to become transcriptionally inactive or silent. 
 
Epigenetic processes play a major role in cancer initiation, progression, and treatmen...
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ETS MAJOR FIELD TEST IN BIOLOGY SENIOR SEMINAR FINAL 2024 QUESTIONS WITH CORRECT ANSWERS ALREADY PASSED AND VERIFIED
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Pyrimidine dimers formed in DNA due to UV radiation can be repaired by? 
SOS repair 
Double strand break repair 
Mismatch repair 
Photoreactivation repair (nucleotide excision repair) 
Base excision repair - CORRECT ANSWER Photoreactivation repair (nucleotide excision repair) 
Which of the following repair mechanisms uses methyl groups to distinguish between parental and daughter strands? 
 
Answers: 
Mismatch repair 
Photoreactivation repair (Nucleotide excision repair) 
SOS repair 
Doubl...
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WGU C785 FINAL EXAM Questions With Correct Answers Latest 2024 GRADED (Biochemistry Units 2-7)
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WGU C785 FINAL EXAM Questions With Correct Answers Latest 2024 GRADED (Biochemistry Units 2-7) What is the basic structure of an amino acid? What do they look like? - Answer amino 
group (NH2 or NH3), carboxyl group (COO or COOH), alpha carbon (C), and variable 
group 
How do you identify the 3 different types of side chains: non-polar/hydrophobic, polar, 
and charged? - Answer Non-polar/hydrophobic - end with CH or "can't have" water. 
Polar - end with OH, SH, or NH. Charged - end with a cha...
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Biochemistry USMLE Step 1 Exam Questions With Answers
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Biochemistry USMLE Step 1 Exam Questions With Answers 
 
histones are rich in which 2 AA's -ANSWER- lysine & argenine 
 
Barr bodies (what, type of chromatin) -ANSWER- inactive X chromosomes 
heterochromatin (highly condensed, sterically inaccessible) 
 
less condensed, transcriptionally active, sterically accessible chromatin -ANSWER- euchromatin 
 
DNA methylation at CpG islands -ANSWER- represses transcription 
"CpG Methylation makes DNA Mute" 
 
DNA methylation (what is methylated and why...
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c785 study guide PA Questions and answers already graded A+| Updated & Verified | 2024
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Complementary DNA and/or RNA molecules pair with each other by hydrogen bonding during 
replication, transcription, or translation. Which of the following pairs of molecules are complementary? 
(Select all that apply) - tRNA and mRNA 
mRNA and template DNA 
During DNA replication the parent strands ______ and DNA polymerase______. - separate, creates 
the new DNA strands 
The following sequence is one strand of the DNA that makes up the SNCA gene that codes for alphasynuclein, a protein found in...
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