Nucleosomes Study guides, Class notes & Summaries

IB Biology HL Topic 7 Latest 2024 Graded A DNA structure antiparallel strands, 3'-5' linkages, and H bonding between purines and pyrimidines Nucleosomes consist of DNA wrapped around 3 histone proteins and are held together by another histone protein Nucleosomes help to supercoil chromosomes and help to regulate transcription Unique (single-copy) genes are translated and constitute a surprisingly small proportion of eukaryotic DNA Highly repetitive sequences constitute 5-4...

Two types of cell division in eukaryotes - Answer-Mitosis, Meiosis Meiosis produces - Answer-gametes (sex) Mitosis produces - Answer-somatic cells (non-stem, non-sex) Cell division in prokaryotes is called - Answer-Binary fission In binary fission, the parent cell... - Answer-...divides to create *clonal* daughter cells (identical to each other + parent cell) Mitosis is - Answer-the division of the nucleus cytokinesis is - Answer-the division of the cytosol + other organelles 3 Functions...

IB Biology - Unit 7 - Nucleic Acids HL 100% Solved Antiparallel strands DNA is anti-parellel, meaning the strands run in opposite directions to each other. If one has a 3' at the top the other has a 3' at the bottom, Purines Adenine and Guanine. Pyrimidines Cytosine, Thymine and Uracil Nucleosomes Used for packing DNA, made up of a length of DNA around a group of 8 histones Supercoiling of DNA Winding of DNA strands, this can reduce the size of DNA by 10000x, using nucleos...

Bio 115 WVU Final (Dr. Barry) Questions and Answers Graded A+ For e. coli , the lacl repressor gene is expressed when? The lacl repressor gene is always expressed Where does the lacl repressor gene attach The lacl repressor gene codes for a protein which attaches to the lac operon operator In the absence of lactose, does the lacl repressor gene bind to DNA Yes, in the absence of lactose, the lacl repressor gene binds to DNA preventing transcription; this is an example of negative...

Friedrich Miescher - discovered DNA in 1869 But did not know (Isolated phosphate) rich acidic compounds Frederick Griffith - Discovered transformation during an experiment that involved injecting mice with smooth S cells, rough R cells, heat-killed S cells, and heat-killed S cells with living R cells. Avery, MacLeod, McCarty - Identified the heritable substance as DNA Used test tubes- vitro Hershey and Chase - performed experiments showing that DNA is the genetic material of a phage known...

What is a histone? A. A protein found in prokaryotic cell nuclei that facilitates transport of DNA from inside the nucleus to the cytoplasm. B. A protein found in eukaryotic cell nuclei that package and order the DNA into structural units called nucleosomes. C. A protein found in eukaryotic cell nuclei that facilitates transport of DNA from inside the nucleus to the cytoplasm. D. A protein found in prokaryotic cell nuclei that package and order the DNA into structural units called nu...

A&P 1 Final Exam Questions A& P 1 Chamberlain College Of Nursing - Question and answers correctly solved 2024 A&P 1 Final Exam Questions In a series of measurements of resting transmembrane potentials, the following values were recorded. Which one is likeliest to be an error? A) -70 mV B) -20mV C) -40mV D) +100mV - correct answer D) +100 mV Histones are found in... - correct answer nucleosomes. The three major subdivisions of extracellular fluid found in the body are plasma, i...

C785 Epigenetics Exam (Latest 2023 - 2024) Actual Questions and Answers 100% Correct 1. Proteins that promote coiling of DNA and help prevent DNA strands from "tangling" are called? Answer: Histones The combination of DNA and histone proteins creates nucleosomes. 2. Epigenetics. Given the following modification of the nucleosomes, dis- cuss how the transcription and gene expression is impacted. In A the nucleosomes are less condensed, and inBthey are more tightly wound.WouldA or B fo...

The process of cell division that ensures that each of the two daughter cells receives the same number of chromosomes as the parent cell is known as... Meiosis Replication Mitosis Non-Disjunction Crossing Over - Mitosis The portion of the cell cycle during which the chromosomes are replicated is called... G1 G2 S M Prophase - S __________ uses a genetic cross to determine patterns of inheritance Population Genetics Transmission Genetics Molecular Gene...

Prokaryotic cell - Answer-Single-celled miroorganism with no membrane bound organelles Eukaryotic cell - Answer-Has a nucleus and membrane bound organelles Cabpsule - Answer-Only in plants, jelly-like fluid, protects cell wall Nucleiod - Answer-Singular circlular molecule of DNA Flagellum - Answer-Protein fiber, movement Plasma membrane - Answer-Controls what goes in and out Cilia - Answer-Sweep materials off cell surface Rough ER - Answer-Ribosomes, materials for protein synthesis Smoot...