Core histone Samenvattingen, Aantekeningen en Examens

HMX Genetics Exam Questions with Correct Answers Single Nucleotide Variant (SNV) - ANSWER differences in DNA sequence. 46 chromosomes. >1% of population. Common complex traits bp in nucleus - ANSWER 6 billion Chromatin - ANSWER packaged DNA. Composed of DNA helix wound around histone proteins forming nucleosomes. 150 bp of DNA wound around each histone core Amino acid - ANSWER 20 different molecules used to build proteins. Coded by genes. Organic. Contains...

Chromatin structure - AnswerNegatively charged DNA loops twice around histone octamer (2 each of the positively charged H2A, H2B, H3, and H4) to form nucleosome bead. H1 ties nucleosomes together in a string. (Think of "beads on a string"; H1 is the only histone that is not in the nucleosome core.) In mitosis, DNA condenses to form mitotic chromosomes. <img src="66a - Euchramatin strxr.JPG" /> Heterochromatin - AnswerCondensed, transcriptionally inactive ("H eteroC hromatin = H igh...

binary fission - asexual, usually in prokaryotes origin (of replication) - bidirectional (replication AND separation together) homologous chromosome (homologue) - one from mom, one from dad; similar not identical; same alleles in the same order chromatid; sister chromatid - two IDENTICAL halves of a single replicated eukaryotic chromosome histone - proteins that have DNA wrapped around them in the *nucleosome* structure nucleosome - 147nt of DNA wrapped around a core of 8 histone proteins ...

(Summary) Brooks Biological Principles Exam 3 Latest 2024 Solved 100%. Mitosis • the duplication and division of the nucleus • results in clones with no variation or adaptation • takes place in somatic cells (non-sex cells) • starts with one cell and creates 2 identical daughter cells • replicated chromosomes are evenly divided so that each daughter cell receives a complete set (46 chromosomes) • can occur by itself, but usually involves cytokinesis • not synonymous with ...

Bio 181 (Module 4: Self Check)The actin filament system extends outside of the cell. - correct answer False Consider the geography of cells. Actin filaments are present in the cell's ___ and the microtubules are present in the cell's . - correct answer cell cortex - cell interior Chromosomes are made out of Euchromatin. - correct answer True To get into the nucleus a component has to have the correct signal sequence and pass through a nuclear pore. - correct answer True The actin f...

Which process describes cell division in prokaryotic organisms?Answer - binary fission What is the term used to describe about 150 nucleotides of DNA wrapped around a core of histone proteins?Answer - nucleosome Meiotic cell division plays a key role in which biological processes?Answer - sexual reproduction During the G1 phase of the cell cycle, most of the DNA would be in what state of compaction?Answer - 30-nm fiber During telophase of mitosis, how many DNA double helices make...

FAU Dr. Brooks - Biological Principles - Unit 3 Comprehensive Study Guide 2024 with complete Solutions What is the cell theory? - Answer- All organisms are made come from cells and are made up of cells Cells must reproduce for what 2 reasons? - Answer- Cells must reproduce either to perpetuate the species or create a multi-celled individual Cell reproduction involves which two processes? - Answer- Cell reproduction involves mitosis (duplication and division of the nucleus) and cytokinesi...

MMSC 490 Exam 2 Questions and Answers All Correct The genomes of salamanders contain ten times more DNA than the genomes of humans because salamanders - Answer-have more noncoding DNA than humans have. A gene can be defined as a segment of DNA that codes for - Answer-functional product. Introns in mRNA-coding genes are the transcribed sequences - Answer-between protein-coding sequences. In the nucleus, introns are removed from transcripts by - Answer-splicing introns can encode - Ans...

DNA packaging: goes from....correct answers Double helix -> chromatin -> chromosomes Nucleosomes are made up ofcorrect answers Core proteins: H2A, H2B, H3, H4 200 bp of DNA ish H1 linker histones bind to DNA Histone code hypothesis statescorrect answers Covalent modification of histone residues via the N-tail of core histones affect the transcriptional status of DNA Histone acetylation works bycorrect answers neutralizing the charges on histones and loosens up the interactions b...

Cell division requires what 3 things? - Answer-1. Replication of genetic material 2. Accurate segregation of genetic material 3. Divison of the cytoplasm between two cells Main difference between prokaryotes + eukaryotes? - Answer-Size and presence of membrane bound nucleus - prokaryotes are smaller, no nucleus / membrane bound organelles What is the term used to describe about 150 nucleotides of DNA wrapped around a core of histone proteins? - Answer-nucleosome Meiotic cell division play...