• 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
Tool 1
Tool 1

... When performing PFGE, the circular bacterial DNA is treated with a particular restriction enzyme. These are protein structures that bind to particular sequences of normally 6 DNA letters (eg TCTAGA, but nowhere else in the DNA) and cut the DNA in two at these sites. The particular 6-letter sequences ...
Study Guide - final exam
Study Guide - final exam

... Use the Typhoon phosphoimager to detect the radioactivity signatures stored on the phosphoimager screen. Based on the signals obtained with the two hybridization probes determine whether the cloned DNA segment contains at gene and if so, determine the direction of transcription in yeast of the natur ...
DNA SEQUENCING (using an ABI automated sequencer)
DNA SEQUENCING (using an ABI automated sequencer)

... dideoxynucleotides, and is loaded into a separate well of a polyacrylamide gel (as above). This method has also been adapted for use with PCR. In this case, a small amount of DNA is used in conjunction with ddNTPs, dNTPs, and a labeled dNTP. This adaptation has also been used in automated sequencing ...
Document
Document

... 3. What are the three roles of DNA? Explain how the structure of DNA aids in each role. Store information – stores information in the sequence of the base pairs Copy and transmit information – the hydrogen bonds between bases break easily, exposing the bases to be copied. The covalent bonds hold the ...
DNA
DNA

... pentose sugar, and a phosphate group (fig. A). There are 4 bases, separated into 2 groups: purines (adenine, guanine) and pyrimidines (cytosine, thymine) (fig. B). ...
BIOL 1107 - Chapter 17
BIOL 1107 - Chapter 17

... -A known single-stranded DNA or RNA is labeled -It is then used as a probe to identify its complement via specific base-pairing -Also termed annealing ...
Genetics
Genetics

honors biology b final exam review guide
honors biology b final exam review guide

Biology is the only subject in which multiplication is the same thing
Biology is the only subject in which multiplication is the same thing

... developed double helix model of DNA  other leading scientists working on question: ...
Chapter 20: Biotechnology 11/18/2015
Chapter 20: Biotechnology 11/18/2015

... cuts sugar-phosphate backbones. ...
Comparison of p53 Structure: Wild type vs. mutant
Comparison of p53 Structure: Wild type vs. mutant

Chap2 DNA RNA and Protein
Chap2 DNA RNA and Protein

... ATP: adenosine triphosphate, energy stored in ATP can drive many bioreactions (e.g. active transport by hydrolyzing to ADP or AMP). ...
14_lecture_ppt - Tracy Jubenville Nearing
14_lecture_ppt - Tracy Jubenville Nearing

The Hereditary Material - Advanced
The Hereditary Material - Advanced

... which breaks down DNA, destroyed the transforming power. Together, these results showed that neither proteins nor RNA carried the "instructions" (or the genes) which allowed transformation. These results also indicated that DNA was the heredity material. The year was 1944. However, this finding was ...
Lecture 7 Mutation and its consequences CAMPBELL BIOLOGY
Lecture 7 Mutation and its consequences CAMPBELL BIOLOGY

... individuals that differ in the phenotypic expression of a given trait e.g. tall vs dwarf 2.  Evolution would also not be possible without variants 3.  Variants are sometimes referred to as mutants especially if they have been deliberately produced in the laboratory 4. How do variants or mutants aris ...
RECOMBINANT DNA USING BACTERIAL PLASMIDS
RECOMBINANT DNA USING BACTERIAL PLASMIDS

... After you have tested all 8 enzymes, decide which ONE enzyme you would choose to cut the plasmid and the human DNA. Use the scissors to make the cut in your plasmid and cell DNA in the staggered fashion made by the actual enzymes. These are called STICKY ENDS. Use tape to splice you insulin gene int ...
Introduction to Molecular Pathology
Introduction to Molecular Pathology

Competence
Competence

... of naturally competent bacteria Neither plasmids nor phage DNAs can be efficiently introduced into naturally competent cells for two reasons: 1. They must double stranded to replicate. Natural transformation requires breakage of double-stranded DNA and degradation of one of the two strands so that a ...
ch. 12 Biotechnology-notes-ppt
ch. 12 Biotechnology-notes-ppt

... • Certain points between the genes on the DNA have repeating base sequences. – For example: ATTACGCGCGCGCGCGCGCTAGC – These are called variable nucleotide tandem repeats (VNTRs for short) ...
trial by probability: bayes` theorem in court - UW
trial by probability: bayes` theorem in court - UW

... and most mathematical evidence is underweighed rather than overweighed. To determine whether or not juries correctly interpret probabilistic evidence, many studies involving hypothetical crimes and mock juries were conducted. The studies operated in the following manner: (1) the jury would initially ...
DNA MUTATIONS AND THEIR REPAIR
DNA MUTATIONS AND THEIR REPAIR

... 1. inside the nucleus : (nDNA) exists in large scale aggregate structures known as chromosomes which are composed of DNA wound up around bead-like proteins called histones. Whenever the cell needs to access the genetic information encoded in nDNA it will unravel the required section, read it, and th ...
Printable PDF - Science Prof Online
Printable PDF - Science Prof Online

... •  Copying of a double-stranded DNA molecule. •  Each DNA strand holds the same genetic information, so each strand can serve as a template for the new, opposite strand. ...
1 - LWW.com
1 - LWW.com

... DNA probe obtained from Ventana Medical Systems Inc (Tucson, AZ) according to manufacturer’s instructions and using the Benchmark XT automated slide stainer with appropriate secondary and ultraView SISH Detection reagents. Following precipitation of the silver particles within the nuclei, a single b ...
NEW Topic 2 Genes and Health Objectives
NEW Topic 2 Genes and Health Objectives

... 12. Understand the roles of the DNA template (antisense) strand in transcription, codons on messenger RNA and anticodons on transfer RNA. 13. Understand the nature of the genetic code (triplet code, non-overlapping and degenerate). 14. Know that a gene is a sequence of bases on a DNA molecule that c ...
Nucleic Acid Structures, Energetics, and Dynamics
Nucleic Acid Structures, Energetics, and Dynamics

... used in detecting small changes in sequence, such as singlebase mutations in some genetic diseases. The ultimate goal is to be able to quickly sequence any DNA or RNA from a single molecule without first amplifying it by the polymerase chain reaction (PCR).18 The method will be left as an exercise f ...
< 1 ... 108 109 110 111 112 113 114 115 116 ... 294 >

Nucleic acid double helix



In molecular biology, the term double helix refers to the structure formed by double-stranded molecules of nucleic acids such as DNA. The double helical structure of a nucleic acid complex arises as a consequence of its secondary structure, and is a fundamental component in determining its tertiary structure. The term entered popular culture with the publication in 1968 of The Double Helix: A Personal Account of the Discovery of the Structure of DNA, by James Watson.The DNA double helix polymer of nucleic acids, held together by nucleotides which base pair together. In B-DNA, the most common double helical structure, the double helix is right-handed with about 10–10.5 base pairs per turn. This translates into about 20-21 nucleotides per turn. The double helix structure of DNA contains a major groove and minor groove. In B-DNA the major groove is wider than the minor groove. Given the difference in widths of the major groove and minor groove, many proteins which bind to B-DNA do so through the wider major groove.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report