• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Document
Document

... • products are fed into thin capillary tube • 10 to 300 µm in diameter and ~ 50 cm long • applied electric field of up to 1,200 V/cm • higher fields can be used with smaller cross sections due to the ability to remove heat more rapidly • tag DNA with tag to “light up” strands across gel ...
Answers to Mastering Concepts Questions
Answers to Mastering Concepts Questions

... the same restriction enzyme to cut a plasmid. After splicing the gene into the plasmid, they would induce bacterial cells to take up the plasmid. The bacterial cells would then produce the protein. 2. Transgenic crops often require fewer herbicides and insecticides than conventional crops. In that r ...
X Chromosome
X Chromosome

... A shaded circle or square indicates that a person expresses the trait. ...
NJBCT Practice Quizzes
NJBCT Practice Quizzes

... _____32.The types of enzymes produced in a cell are regulated by the a. shape of DNA molecules b. order of nucleotides in DNA molecules c. size of nucleotides in DNA molecules d. location of DNA molecules Some steps involved in DNA replication and protein synthesis are summarized in the table below. ...
DNA - The Double Helix
DNA - The Double Helix

... The two sides of the DNA ladder are held together loosely by hydrogen bonds. The DNA can actually "unzip" when it needs to replicate - or make a copy of itself. DNA needs to copy itself when a cell divides, so that the new cells each contain a copy of the DNA. Without these instructions, the new cel ...
Slides - Department of Computer Science
Slides - Department of Computer Science

... • Linear sequence of amino acids folds to form a complex 3-D structure. • The structure of a protein is intimately connected to its function. ...
RNA and Protein Synthesis
RNA and Protein Synthesis

... with sickle-cell anemia have a survival advantage. Sickleshaped red blood cells are resistant to the infectious parasite that causes malaria, and people with this trait were more likely to survive malaria epidemics. ...
press alert - the Gregor Mendel Institute
press alert - the Gregor Mendel Institute

... Science paper, “Active DNA Demethylation in Plant Companion Cells Reinforces Transposon Methylation in Gametes”, the authors report that DNA de-methylation in the female and male gamete companion cells reinforces de novo DNA methylation of transposons in gametes, with the implication that DNA de-met ...
D.N.A. activity
D.N.A. activity

... compaction ratio. 2 meters DNA into a nucleus (assume large 1 micrometer long nucleus) = 2,000,000/1 length: length ratio. Notice that cells accomplish over a 1,000 greater length compaction ratio. Length:volume If considering length/volume compaction (a better analysis): 20 meters thread into a cap ...
Unit 4 Review
Unit 4 Review

Practice EOC Questions
Practice EOC Questions

... A. It maintains the same exact DNA from one generation to the next. B. It helps to increase genetic variation. C. It promotes more interaction between males and females of the same species. D. It helps maintain the chromosome number of the species. The correct answer is… B ...
101 -- 2006
101 -- 2006

... __ 18. Which of these is found in RNA but not in DNA? a) Adenine c) Thymine e) Deoxyribose sugar b) Uracil d) Phosphate groups __ 19. The number of consecutive mRNA bases needed to specify an amino acid is: a) 3 b) 4 c) 20 d) 64 e) A variable number __ 20. The process of copying genetic information ...
•How? . . . _____ - Model High School
•How? . . . _____ - Model High School

... bottom the ________ strand is opposite 3’-5’ ...
Lecture Notes
Lecture Notes

... netic inormation is stored in the base sequence of DNA molecules. Ultimately, during the process of gene expression, this inormation is used to synthesize all the proteins made by an organism. Classically, a gene is a unit of the DNA that encodes a particular protein or RNA molecule. Although this d ...
Setting up a transformation--how will the competent cells be treated?
Setting up a transformation--how will the competent cells be treated?

... How to transfer recombinant lambda into cells? ...
Sample IHC Normal Expression Report Reason For Referral
Sample IHC Normal Expression Report Reason For Referral

... The results of the IHC analysis suggest the presence of normal DNA mismatch repair function within the tumor. Thus, the likelihood that this individual has an inherited colon cancer syndrome due to defective DNA mismatch repair (HNPCC/Lynch syndrome) is reduced but not eliminated. These results redu ...
Bacterial Transformation with Recombinant DNA
Bacterial Transformation with Recombinant DNA

... In this lab we are going to learn some basic techniques and concepts used to clone DNA molecules. A DNA molecule (or gene) is said to be cloned if it is contained in a vector DNA molecule from which the cloned DNA can be readily isolated. There are different types of cloning vectors such as plasmids ...
DNA Purity Instruments
DNA Purity Instruments

... Although broad spectrum xenon flash lamps have better stability than mercury lamps for DNA purity measurements, instruments with these lamps tend to be more expensive. Xenon flash lamps generate ample light across multiple wavelengths, but only light at a particular wavelength is useful for any sin ...
AG-BAs-02.471-05.4p c-Biotechnology_Larry_Stine
AG-BAs-02.471-05.4p c-Biotechnology_Larry_Stine

... DNA - Genetic Code of Life Cloning is common scientific knowledge Early 1980’s Genetic Engineering developed 1867 Friedrich Meischer discovered DNA which is similar in all living cells structure function composition transmitter of hereditary information ...
Slides - Department of Computer Science
Slides - Department of Computer Science

... • Linear sequence of amino acids folds to form a complex 3-D structure. • The structure of a protein is intimately connected to its function. ...
Chapter 15
Chapter 15

... • 1961 Francis Crick- hypothesized that blocks of information (codons) made up the genetic code and that each codon corresponds to an amino acid in a protein. • Crick’s hypothesis stated the 3 nucleotides made up a codon because 43=64 possible combinations of A, T, C and G which is more than enough ...
Chapter 14 - Genomes and genomics
Chapter 14 - Genomes and genomics

... You are a researcher who has tentatively identified a human homolog of a yeast gene. You determine the DNA sequence of cDNAs of both your yeast gene and the human gene and decide to compare the gene sequences, as well as the predicted protein sequence of each, using alignment software. You would exp ...
Genetics revision for learners
Genetics revision for learners

... Meiosis produces gametes with half the number of chromosomes. This means that pairs of alleles are separated at meiosis. During meiosis matching chromosomes cross over (swap sections of the chromosome) which adds variation. Independent assortment also increases variation as the chromosome pairs rand ...
DNA barcoding in medicinal plants: Testing the potential of a
DNA barcoding in medicinal plants: Testing the potential of a

... • The sequence lengths range from 219 to 719 bp. The shortest locus is ITS2, at 219-222 bp. The average GC content of each locus is also different, the highest one is ITS2 (reaching up to 66.2%), and the lowest is psbA-trnH (with a content of 27.0%). • The efficiencies of PCR amplification and succe ...
AMP v. Myriad – Brief History
AMP v. Myriad – Brief History

... HOLDING: “Myriad did not create anything. To be sure, it found an important and useful gene, but separating that gene from its surrounding genetic materials is not an act of invention” COMPROMISE: “cDNA does not present the same obstacles to patentability as naturally occurring, isolated DNA segment ...
< 1 ... 255 256 257 258 259 260 261 262 263 ... 492 >

DNA supercoil



DNA supercoiling refers to the over- or under-winding of a DNA strand, and is an expression of the strain on that strand. Supercoiling is important in a number of biological processes, such as compacting DNA. Additionally, certain enzymes such as topoisomerases are able to change DNA topology to facilitate functions such as DNA replication or transcription. Mathematical expressions are used to describe supercoiling by comparing different coiled states to relaxed B-form DNA.As a general rule, the DNA of most organisms is negatively supercoiled.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report