Histone methylation - Study guides, Class notes & Summaries

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...

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...

CELLULAR BIO FINAL STUDY GUIDE Qs&As 2024 A+ gene expression - ANS-processes that control the turning on or turning off of a gene histone modification can - ANS-loosen chromatin and promote transcription DNA methylation does what - ANS-condenses chromatin, inhibits transcription, can be passed via epigenetic inheritance post transcriptional regulation allows - ANS-cells to fine tune gene expression in response to environmental changes prokaryotic gene regulation - ANS-mostly at transcri...

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...

activators - TFs that increase the levels of transcription initiation Adaptive mutations - evolutionary change and adaptation to new environments, stressful conditions darwins birbs AP - activator proteins ARE - AP2 response elements Base analogs (chem induced - 5-bromouracil resembles thymine, except that it has bromine atom in place of methyl on 5' C base excision repair (BER) - repairs damaged base by using AP endonuclease to cleave damage on 5' side and DNA polymerase add new base...

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...

©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 1/31 NU 318 Genetics- Exam 3 Study Guide with Complete Solutions Define Epigenetics - Ans:-the study of environmental influences on gene expression that occur WITHOUT a DNA change - they are chemical or environmental modifications ex: parental diet and environmental toxins What are the components of the epigenome? - Ans:-1. methylation 2. micro RNA 3. histone modification Define methylation - A...

Nucleic Acid grows by attachment of 5' phosphate group of the incoming nucleotide to the 3'hydroxyl group of the last nucleotide double stranded DNA most energetically favorable state for DNA Purines double-ring structure Adenine (A) + Guanine (G) Pyrimidine single-ring structure Uracil (U)+ Cytosine Messenger RNA (mRNA) -template for all protein synthesis -encode all information necessary to produce proteins Heterogeneous nuclear RNA primary product o...

Predominant form of DNA -Correct Answer Right-handed B DNA and histone interaction is due to what type of bond? -Correct Answer Ionic What stains to the minor groove of DNA duplex? -Correct Answer SYBR Green What is the most abundant type of RNA? -Correct Answer Ribosomal RNA (rRNA) What does RNA act as in a retrovirus? -Correct Answer Genome and mRNA What increases half-life of mRNA? -Correct Answer 5' Methyl Cap What kind of DNA is most likely to be transcriptionally active?...

Chapter 1 correct answers Fundamentals of DNA, Chromosomes, and Cells Structure and Function of Nucleic Acids correct answers Objectives: Fluently use appropriate vocabulary to describe the structure of nucleic acids Diagram and describe the structure of DNA & RNA molecules found in nature Articulate the organization of DNA in chromosomes Describe the role of the cell cycle and DNA replication in maintaining genomic stability Nucleic acids correct answers genetic material of cel...