Histone acetylation - Study guides, Class notes & Summaries

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?) ...

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...

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...

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...

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...

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 ...

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...

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 ...

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...

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...