• Study Resource
  • Explore
    • 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
DNA (Deoxyribonucleic Acid)
DNA (Deoxyribonucleic Acid)

... Speed of DNA Replication • In the human cell, 50 nucleotides can be added every second. It would that several days for replication to occur if the DNA did not start at several spots on the DNA so that it is occurring in many places on the DNA strand. ...
Sample Examination Questions for Exam 3 Material
Sample Examination Questions for Exam 3 Material

... for another so that a sense codon UCG in the coding region is changed into the stop codon UAG. This means that translation terminates prematurely, resulting in a protein that is too short to carry out its enyzmatic functions. It is possible to isolate another E. coli mutant gene called a nonsense su ...
CHAPTER 17 FROM GENE TO PROTEIN
CHAPTER 17 FROM GENE TO PROTEIN

... There is redundancy in the genetic code but no ambiguity.  Several codons may specify the same amino acid, but no codon specifies more than one amino acid.  The redundancy in the code is not random. In many cases, codons that are synonyms for a particular amino acid differ only in the third base o ...
CHAPTER 17 FROM GENE TO PROTEIN
CHAPTER 17 FROM GENE TO PROTEIN

... There is redundancy in the genetic code but no ambiguity.  Several codons may specify the same amino acid, but no codon specifies more than one amino acid.  The redundancy in the code is not random. In many cases, codons that are synonyms for a particular amino acid differ only in the third base o ...
Reaction dynamics simulation of single and double strand breaks in
Reaction dynamics simulation of single and double strand breaks in

... (ii) Cleavage of the C-O bond between neighboring sugar and phosphate, followed by hydrogen transfer from the sugar to the phosphate. The observed strand break process following a base loss is consistent with the MALDI analysis shown in Fig.1 [6], which validates the use of the present DFTB approac ...
TG_REV_NAP_short.ver2 - RI
TG_REV_NAP_short.ver2 - RI

... how would this affect the protein folding? Draw a picture to show any differences. The drawing should show the hydrophilic amino acids on the outside, because water molecules will be attracted to those amino acids at least as much as they are attracted to other water molecules. ...
Why are we all so different? DNA Extraction
Why are we all so different? DNA Extraction

... DNA instructions are divided into segments called genes. Each gene provides the information for making a protein, which carries out a specific function in the cell. A molecule of DNA (DeoxyriboNucleic Acid) is composed of two backbones and four types of chemical bases. The backbone is formed by a ch ...
Student Handout #1
Student Handout #1

... Almost all dynamic functions in a living organism depend on proteins.  A wide variety of essential functions  carried out by proteins have been identified including support, movement, transport, buffering, metabolic  regulation, coordination and control and defense.  More than 50% of the dry mass of ...
DNA Repair and Recombination
DNA Repair and Recombination

... strands and then ligating the cut ends so that the two DNA molecules can separate from each other. • The recombination of genetic markers outside the recombination site only occurs if one cut is horizontal and the other is vertical (as shown in the previous slide). • If both cuts are horizontal, or ...
10/14/04 8:25 am
10/14/04 8:25 am

... amino acids linked into polypeptide chains with fold and form into proteins 20 different amino acids used in all living things amino acids linked by condensation reaction, aka dehydration synthesis reaction. DNA • nucleotides linked together by condensation reaction. • T,A, C, G bases possible By 19 ...
Express Letter A New Self-Fabrication of Large
Express Letter A New Self-Fabrication of Large

... level are making dramatic progress along with genetic engineering and molecular biology. DNA is the most important material in life science. However, DNA can also be regarded as a naturally occurring and highly specific functional biopolymer. In Nishi’s studies, DNA immobilized on substrates and fib ...
BIO 10 Lecture 1
BIO 10 Lecture 1

... pairing was more specific, dictated by the base structures • They determined that adenine (A) paired only with thymine (T), and guanine (G) paired only with cytosine (C) • The Watson-Crick model explains Chargaff’s rules: in any organism the amount of A = T, and the amount of G = C ...
TEXT Components of DNA To understand the structure of DNA, it is
TEXT Components of DNA To understand the structure of DNA, it is

... A most important clue to the structure of DNA came from Erwin Chargaff & his colleagues in 1949. The data collected by them from DNAs of many different species, led to the following conclusions: a. The base composition of DNA generally varies from one species to another (Table-1 ). b. DNA specimens ...
DNA
DNA

... the near-neutral pH of the cell. • At acidic or alkaline pH the bases become charged and their solubility in water increases. • Hydrophobic stacking interactions in which two or more bases are positioned with the planes of their rings parallel are one of two important modes of interaction between ba ...
Student Team 1 Presentation
Student Team 1 Presentation

... for our understanding oftherapeutic viral fitness, virulence, andof isolated clones intervention from studies is limited. agents [1–3]. The ongoing global AIDS pandemic and the into a in antiviral therapeutic strategy. Even a defined molecular clone will quickly transform and natural resurgence of i ...
New Measurements of DNA Twist Elasticity
New Measurements of DNA Twist Elasticity

... The idea of studying the response of DNA to mechanical stress is as old as the discovery of the double helix structure itself. While many elements of DNA function require detailed understanding of specific chemical bonds (for example the binding of small ligands), still others are quite nonspecific ...
Noncoding Y RNAs
Noncoding Y RNAs

... QC - Ro binds incorrectly folded small RNAs Facilitates cell survival after exposure to UV ...
DNA Replication Packet - Mr. Barrow's Science Center
DNA Replication Packet - Mr. Barrow's Science Center

... James Watson, Francis Crick and Maurice Wilkins are awarded the Nobel Prize in Medicine for discoveries about the molecular structure of nucleic acids. ...
DNA in the Courtroom - Centralia College
DNA in the Courtroom - Centralia College

... that are necessary for survival. ...
DNA - Cobb Learning
DNA - Cobb Learning

... carries these genetic instructions. • Within a gene, each group of three nitrogenous bases codes for one amino acid. • A sequence of amino acids is linked to make a protein. • Proteins are fundamental to the function of cells and the expression of traits. Mr. Blacher's 7th Grade Biology ...
Activity 16.1 Is the Hereditary Material DNA or Protein?
Activity 16.1 Is the Hereditary Material DNA or Protein?

... only 14N-labeled nucleotides. If they disrupted (broke open or lysed) the bacteria, they could extract the DNA. They could then layer the DNA on top of a CsCl gradient in a centrifuge tube. When they centrifuged this tube, the DNA settled out or layered at the density (in the CsCl solution) that was ...
T7 Endonuclease I assay
T7 Endonuclease I assay

... - DNA-binding domain - Cleavage domain (FokI Nuclease)  Spacers requirement different: - 5-7 bp for ZFNs - 12-21 bp for TALENs  Targeted site can be chosen to span an endogenous restriction (in the spacer) ...
Investigation of DNA Replication Mechanisms
Investigation of DNA Replication Mechanisms

... Model established from Meselson-Stahl Centrifugation Experiments ...
Course Chemical Biology of Nucleic Acids
Course Chemical Biology of Nucleic Acids

... ring closure either α- or β- configured. An alternative ring closure provides 5membered rings which are called the furanosidic forms of sugars. They are higher in energy and hence only to a small extend formed in solution. Regarding the α/β equilibrium, the β-anomers are more stable because in the β ...
DNA Replication
DNA Replication

... • The free floating nucleotides in your cells are derived from the food you eat. Steak supplies you with muscle cells from a cow. Does not mean you will turn into a cow. Specialized enzymes in your digestive tract break down the cow DNA into cucleotides which you use to make human DNA ...
< 1 ... 22 23 24 25 26 27 28 29 30 ... 148 >

Helicase



Helicases are a class of enzymes vital to all living organisms. Their main function is to unpackage an organism's genes. They are motor proteins that move directionally along a nucleic acid phosphodiester backbone, separating two annealed nucleic acid strands (i.e., DNA, RNA, or RNA-DNA hybrid) using energy derived from ATP hydrolysis. There are many helicases resulting from the great variety of processes in which strand separation must be catalyzed. Approximately 1% of eukaryotic genes code for helicases. The human genome codes for 95 non-redundant helicases: 64 RNA helicases and 31 DNA helicases. Many cellular processes, such as DNA replication, transcription, translation, recombination, DNA repair, and ribosome biogenesis involve the separation of nucleic acid strands that necessitates the use of helicases.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report