Histone acetylation - Study guides, Class notes & Summaries
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BIO 235 Practice Exam
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1) The nucleotide sequence of the attenuator region in the leader of the trp mRNA - a) Contains features of a transcription termination site 
 
Depurination - the loss of a purine base from a nucleotide 
 
Deamination - the removal of an amino group from an organism, particularly from an amino acid 
 
attenuator region - region of RNA sequence that forms an alternate secondary structures that govern the level of transcription of attenuated operons. 
 
Transcription factors and other regulatory p...
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CBSE FINAL EXAM 2023/2024 GRADED A LATEST VERSION
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CBSE FINAL EXAM 2023/2024 GRADED A LATEST 
VERSION 
A 66-year-old woman comes to the physician because of severe lower back pain. She is otherwise 
healthy with well-controlled hypertension and hyperlipidemia. She does not drink, but has smoked one 
pack of cigarettes per day for the past 20 years. An x-ray of the lumbar spine shows an anterior wedge 
compression fracture of L1. Results of dual-energy X-ray absorptiometry (DEXA) scan shows substantially 
decreased bone density in the region...
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USMLE Step 1- Biochemistry Exam Questions & Answers 2023/2024
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USMLE Step 1- Biochemistry Exam Questions & Answers 2023/2024 
 
Histones are rich in which 2 amino acids? - ANSWER-Lysine 
Arginine 
 
What histone protein is responsible for binding to the nucleosome and to the "linker" DNA thereby stabilizing the chromatin fiber? - ANSWER-H1 
 
When does DNA and histone synthesis occur in the cell cycle? - ANSWER-S-phase 
 
Will the following be increased or decreased or neutral in heterochromatin? 
 
methylation 
acetylation - ANSWER-methylation increased ...
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UCI BIO 93 Final Questions & Answers Already Passed!!
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What is an example of incomplete dominance? - Answer-A red and white snapdragon making a pink 
offspring 
What is an example of co-dominance? - Answer-Blood cells. 
What is Pleiotropy? - Answer-When a gene affects more than 
one phenotypic character. 
What is the norm of reaction? - Answer-The range of phenotypic possibilities 
What are some example of polygenic inheritance? - Answer-Skin color and height 
Norms of reactions are broadest for _____________ characters - Answer-polygenic 
Genetic t...
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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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UCI BIO 93 |58 Final Questions And Answers|2024
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What is an example of incomplete dominance? - ️️A red and white snapdragon making a pink offspring 
 
What is an example of co-dominance? - ️️Blood cells. 
 
What is Pleiotropy? - ️️When a gene affects more than 
one phenotypic character. 
 
What is the norm of reaction? - ️️The range of phenotypic possibilities 
 
What are some example of polygenic inheritance? - ️️Skin color and height 
 
Norms of reactions are broadest for _____________ characters - ️️polygenic 
 
Gene...
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UCI BIO 93 Final Exam Questions and Answers 100% Pass
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UCI BIO 93 Final Exam Questions and 
Answers 100% Pass 
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? -...
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USMLE Biochemistry Exam Questions with Correct Answers
- Exam (elaborations) • 29 pages • 2023
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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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Chromosome Structure Test Questions with Answers
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Chromosome Structure Test Questions with Answers 
 
Where is DNA methylated? - Answer-5' of deoxycytidine 
 
Describe the movement of chromatin within the nucleus. - Answer-Interconverts between euchromatin and heterochromatin quickly, but whole chromosomes do not move much. Specific genes are associated with specific nuclear compartments. 
 
CLINICAL APPLICATION: give an overview of how FISH is used in clinical medicine. Acronym? - Answer-Fluorescence in situ hybridization. Labeled DNA probe ...
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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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