Heterochromatin Study guides, Class notes & Summaries
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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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ETS MAJOR FIELD TEST IN BIOLOGY SENIOR 
SEMINAR FINAL 2024 QUESTIONS WITH CORRECT 
ANSWERS ALREADY PASSED AND VERIFIED 
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 ...
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ETS MAJOR FIELD TEST IN BIOLOGY 2024 QUESTIONS WITH CORRECT ANSWERS ALREADY PASSED AND VERIFIED
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ETS MAJOR FIELD TEST IN BIOLOGY 2024 
QUESTIONS WITH CORRECT ANSWERS ALREADY 
PASSED AND VERIFIED 
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? 
Ans...
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Biology 1406 Exam 3 Questions and Answers Rated A+
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Cell division is used for which of the following ? Reproduction of single-celled organisms, 
growth of multicellular organisms, repair and replacement of cells, and sperm and egg 
production 
Asexual and sexual reproduction differs in that sexual reproduction_____________ Can 
produce great variation among the offspring (Meiosis) 
Asexual Reproduction ____________ Produces offspring genetically identical to the parent 
(Mitosis) 
Most of the time, DNA is in the form of____________ Euchromatin 
W...
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USMLE Step 1- Biochemistry exam 2023 with 100% correct answers
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Histones are rich in which 2 amino acids? - correct answerLysine 
Arginine 
 
What histone protein is responsible for binding to the nucleosome and to the "linker" DNA thereby stabilizing the chromatin fiber? - correct answerH1 
 
When does DNA and histone synthesis occur in the cell cycle? - correct answerS-phase 
 
Will the following be increased or decreased or neutral in heterochromatin?
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MICR 3033 Exam 2 Questions with Revised Answers Graded A+
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MICR 3033 Exam 2 Questions with Revised Answers Graded A+ 
7Q1-How does DNA interact with the core histone nucleosome? - Answer-DNA wraps around the core histone 
 
7Q2-What is the length(fixed)of DNA(in base pairs) that wraps around a core nucleosome? - Answer-147 base pairs 
 
7Q3-What is the 30-nm fiber structure in chromatin? - Answer-solenoid 
 
7Q4-What is meant by the terms Chromatin? Euchromatin? and Heterochromatin? - Answer-Heterochromatin is condensed chromatin which makes it inactiv...
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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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USABO TOP Exam Guide Questions and CORRECT Answers
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Eukaryote - An organism whose cells contain complex structures enclosed within 
membranes. The defining membrane bound structure thats sets them apart from prokaryotic 
cells is the nucleas or nuclear envelope within which the genetic material is carried. All 
species of large complex species are eukaryotes, including animals, plants and funghi. 
Euchromatin - This shows as pale areas in the nucleas under electro magnification. It is 
a less densly packed form of chromatin; 10% is even less ...
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USA Biology Olympiad Practice exam 2024 with 100% correct answers
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Emergent Properties correct answersDue to the arrangement and interaction of parts as complexity increases. pg 3 
 
Reductionism correct answersThe reduction of complex substances to simpler components that are manageable to study. This is a powerful strategy in biology. pg 3 
 
benign tumor correct answersA mass of abnormal cells that remains at the site of its origin. 
 
Heterochromatin correct answersThis shows as dark areas on the eukaryotic nucleas; it is densly packed chormatin (DNA and pr...
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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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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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