Histone acetylation - Study guides, Class notes & Summaries
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USMLE STEP 1 BIOCHEMISTRY Questions and Answers with Complete Solutions 2024
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USMLE STEP 1 BIOCHEMISTRY 
Questions and Answers with 
Complete Solutions 2024 
histones are rich in which 2 AA's - ANSlysine & argenine 
Barr bodies (what, type of chromatin) - ANSinactive X chromosomes 
heterochromatin (highly condensed, sterically inaccessible) 
less condensed, transcriptionally active, sterically accessible chromatin - 
ANSeuchromatin 
DNA methylation at CpG islands - ANSrepresses transcription 
"CpG Methylation makes DNA Mute" 
DNA methylation (what is methylated and why?) ...
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UNE Medical Biochemistry Midterm Review Already Graded A
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UNE Medical Biochemistry Midterm Review Already Graded A 
A family presents for genetic counseling. The couple has two female children who are alive and well; however, their infant son recently died in the nursery with severe hemolysis (lysis of red blood cells) and jaundice. The wife recalls she lost a brother in infancy with severe hemolysis, induced after a viral infection. The physician suspects a glucose-6-phosphate dehydrogenase deficiency, this would result in a deficiency in which of the...
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Biochemistry USMLE step 1: Updated Solution: Guaranteed A+ Guide Solution
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histones are rich in which 2 AA's 
(Ans- lysine & argenine 
 
Barr bodies (what, type of chromatin) 
(Ans- inactive X chromosomes 
heterochromatin (highly condensed, sterically inaccessible) 
 
less condensed, transcriptionally active, sterically accessible chromatin (Ans- euchromatin 
 
DNA methylation at CpG islands 
 (Ans- represses transcription 
 
"CpG Methylation makes DNA Mute" 
 
DNA methylation (what is methylated and why?) 
(Ans- template strand cytosine and adenine are methylate...
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BIOC 385 Exam 4 || very Flawless.
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Number the RNA processing steps in order from 1-6 to generate mRNA transcript. 
a) ___ 3' end cleavage and polyadenylation 
b)__ binding of the U1 and U2 snRNPs 
c)__ generating 7-methylguanosine at 5' end 
d)__ mRNA export from the nucleus to cytosol 
e) __ribozyme cleavage of the intron lariat 
f)__ dissociation of RNA Pol 2 from DNA correct answers a) _4_ 3' end cleavage and polyadenylation 
b)_2_ binding of the U1 and U2 snRNPs 
c)_1_ generating 7-methylguanosine at 5' end 
d)_6_ mRNA ex...
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USMLE step 1 Biochemistry exam 2023 with 100% correct answers
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histones are rich in which 2 AA's - correct answer lysine & argenine 
 
Barr bodies (what, type of chromatin) - correct answer inactive X chromosomes 
heterochromatin (highly condensed, sterically inaccessible) 
 
less condensed, transcriptionally active, sterically accessible chromatin - correct answer euchromatin 
 
DNA methylation at CpG islands - correct answer represses transcription 
 
"CpG Methylation makes DNA Mute" 
 
DNA methylation (what is methylated and why?) - correct answer tem...
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BMSC 220 Post midterm || A+ Guaranteed.
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Transfer tRNA correct answers What completes translation 
Adaptor molecules between mRNA & amino acids in protein synthesis - ensures correct aa 
Transcribed as a group in long pre-mRNAs 
Transcribed by polymerase II 
~ 70-80 nucleotides, Clover leaf/ L structure 
Cleaved post transcription into individual tRNAs 
5' end cleaved by RNaseP 
3' end cleaved by RNase with CCA sequence 
 
Centromere correct answers Specialized region of the chromosome 
Attaches sister chromatids 
Critical role in ...
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NSCI 4501 Exam 1 Questions Perfectly Answered
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19S - regulatory particle of proteasome 
2 Categories of Epigenetics - DNA methylatioin and histone modification 
20S - core particle of proteasome 
26S proteasome - inhibited in sporadic parkinsonism 
3 groups of Bcl-2 family proteins - 1. Group I - Anti-apoptitic 
2. Group II - Inducers 
3. Group III - Potentiate 
3 key molecules of apoptosis - 1. Bcl-2 family proteins 
2. Apaf-1 
3. caspases 
3 metabolic pathways that regulate aging - 1. Dietary restrictions 
2. Insulin/Insulin-like Growth Fa...
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SFSU Biology 230 Final Exam with complete solutions
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SFSU Biology 230 Final Exam with complete solutions 
What are the two components of the proton-motive force? 
a. pH gradient and equilibrium 
b. pH gradient and voltage 
c. voltage and ATP 
d. voltage and lipid-soluble agents - ️️ b. pH gradient and voltage 
Which molecule is responsible for unwinding DNA supercoils before replication in E. 
coli? 
a. DNA helicase 
b. DNA ligase 
c. DNA polymerase III 
d. Gyrase 
e. Topoisomerase I/II - ️️ a. DNA helicase 
What is the likely cause of an ...
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UCI BIO 93 Final exam 2024 with 100% correct answers
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What is an example of incomplete dominance? - correct answer A red and white snapdragon making a pink offspring 
 
What is an example of co-dominance? - correct answer Blood cells. 
 
What is Pleiotropy? - correct answer When a gene affects more than 
one phenotypic character. 
 
What is the norm of reaction? - correct answer The range of phenotypic possibilities 
 
What are some example of polygenic inheritance? - correct answer Skin color and height 
 
Norms of reactions are broadest...
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UNE biochemistry midterm review questions and answers with complete solutions
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Under low energy conditions, AMP will bind to phosphofructokinase I and glycogen phosphorylase at site unique to the active site. This enhances the activity of these enzymes. This is an example of which of the follow types of enzyme regulation? correct answer: Allosteric activation 
 
An example of enzyme activation by cleavage is best illustrated by which of the following? correct answer: Activation of chymotrypsinogen to chymotrypsin 
 
Children with cystinosis have growth delay and both ren...
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