• 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
Keystone Review Module B
Keystone Review Module B

... 2. Compare asexual reproduction to sexual reproduction. In your comparison, be sure to include:  Which type of reproduction results in offspring that are usually genetically identical to the previous generation and explain why this occurs.  One other was these methods of reproduction differ ______ ...
On bioinformatics
On bioinformatics

... • Similarity between species (or genes) that results from inheritance of traits from a common ancestor – Unless know of a common ancestor have to be careful when using this word. ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

... Answer eight questions. Each question carries five marks. 11. Describe the factors affecting the enzymatic activity. 12. Explain any one method to determine the N-terminal residue of an amino acid. 13. Discuss the secondary structure of proteins. 14. Write notes on (a) hydrogenation of oils (b) sapo ...
File
File

... i. Why is it important for so that the purine to form Watson and Crick interactions with a pyrimidine? It is important that the distance between the two strands remains constant. 15. A protein is overexpressed by recombinant DNA technology. The protein is expressed in the cytoplasm of E. coli. The p ...
Genetically Modified Food
Genetically Modified Food

... vector into a host cell (transformation) and Cloning the DNA  Step 1) Adding the plasmid vector into a flask containing culture of a host cell  Step 2) Generating temporary pores on the surface of the host cell  Step 3) Allowing the plasmid vector to enter the host cell  Step 4) Placing the host ...
Sem2 Final SG 12 Part1
Sem2 Final SG 12 Part1

... 1. What does the theory of evolution by natural selection explain? 2. What causes speciation? 3. What evidence do we have to support the theory of evolution by natural selection? 4. Describe the 3 key ingredients that lead to biological evolution. 5. What are homologous structures and what do they t ...
Restriction Enzyme Digestion
Restriction Enzyme Digestion

... • Tap the reaction tube gently several times to mix • Pulse spin the reaction to the bottom of the tube • Incubate the reaction at 37°C ...
Genetics of Viruses & Bacteria
Genetics of Viruses & Bacteria

... Genetic Recombination Foreign ...
Structure of Nucleic Acids
Structure of Nucleic Acids

... most commonly observed in DNA. This results in a very deep and narrow major groove and a shallow and wide minor groove. A second consequence of the presence of the 2'-hydroxyl group is that in conformationally flexible regions of an RNA molecule (that is, not involved in formation of a double helix ...
Lecture#22 - Cloning DNA and the construction of clone libraries
Lecture#22 - Cloning DNA and the construction of clone libraries

... Class Exercise on Random Genomic DNA Library 1- handout papers with clone regions on them -> each student is a clone. Each 4 letter clone represents a fragment of a larger genome (alphabet). The 4 letters denote a particular, and unique, position of the genome. e.g.: A B C D --||----|--|-|----|---- ...
File - Dr Hayley Siddons
File - Dr Hayley Siddons

... • Organisms are different because the proteins in their cells are different • The DNA provided the information about which amino acids make up proteins • It is the arrangement of the base pairs (A-T, C-G) which will determine the type of protein made • Sections of DNA which ‘code’ for a protein are ...
The Only Way To Prove Macroevolution Is True
The Only Way To Prove Macroevolution Is True

... Let us consider another quote from Mr. Dawkins book in which he mentioned Lenski. Prior to the quote I am about to mention, he had talked about how much microevolution (without using the actual term) was able to physically change the appearance of animals. This is the quote: 'If so much evolutionary ...
1. Two subfields of cultural anthropology include
1. Two subfields of cultural anthropology include

... 17. Which of the following would be the best population for studying genetic drift? a. A very small hippie commune with rapidly changing membership b. A farmer’s large herd of cattle with equally large numbers of males and females c. The population of Chernobyl after the meltdown of its nuclear plan ...
Biochemistry
Biochemistry

... 1. Groups are based on similarities and differences of : ...
Ingenious Genes Curriculum Links for AQA GCSE Biology (8461
Ingenious Genes Curriculum Links for AQA GCSE Biology (8461

... Students should be able to discuss the importance of understanding the human genome. This is limited to the: • search for genes linked to different types of disease • understanding and treatment of inherited disorders 4.6.1.5 DNA structure (biology only) Students should be able to describe DNA as a ...
Goal 3
Goal 3

... mRNA triplet codes (codons)match up with tRNA triplet codes (anticodons) ...
Chapter-9-Chromosomes-and-DNA-Replication
Chapter-9-Chromosomes-and-DNA-Replication

... The new DNA is built up from the four nucleotides (A, C, G and T) that are abundant (free nucleotides) in the nucleoplasm. These nucleotides attach themselves to the bases on the old strands by complementary base pairing. Where there is a T base, only an A nucleotide will bind, and so on. DNA polyme ...
I. Natural selection and human evolution
I. Natural selection and human evolution

... functions of living organisms Manipulation of living organisms may have unanticipated effects There are limits to our ability to manipulate the functions of biological structures Balance is necessary for the health of living systems We must make informed decisions despite ambiguous evidence Relative ...
studying genomes - Laboratory of Informatics and Chemistry
studying genomes - Laboratory of Informatics and Chemistry

... just two forms. The value of two-allelic marker (SNP, RFLP) is limited by the high possibility that the marker shows no variability among the members of a family. The advantages of SNP over RFLP: • they are abundant (human genome: 1.5 millions of SNPs, 100 000 ...
What does DNA do?
What does DNA do?

... ___ 3) Follow the base pair rule to fill in the missing base pairs for each strand. ___ 4) Compare your strands. Are they similar? What have you done? Where did this process take place in the cell? Why is this process important? They are identical copies of each other (mirror images). This process t ...
A Critical Review of the Identification of Mass Disaster Remains
A Critical Review of the Identification of Mass Disaster Remains

... two definitions that can explain what is considered a mass disaster: The first tradition definition is any event resulting in six or more deaths at the same time and in the same place from one basic cause, and the second more recent is an event that causes such a number of essentially simultaneous d ...
Chapter 13: Genetic Engineering
Chapter 13: Genetic Engineering

... So what does that tell us? relatedness of individuals (paternity ...
DNA Recombination
DNA Recombination

... Somatic Excision of Ds from C ...
Renal transplant recipients
Renal transplant recipients

... • Concept central to the understanding of molecular biology. • Relates to the hydrogen bonding between strands of DNA. • Antisense strand = complementary to the sense strand: 5'-CCGGTCATTGCCAAGGT-3' 3'-GGCCAGTAACGGTTCCA-5' • The two strands can be split (denatured) by heat and reanneal (hybridise) s ...
Bacteria and Recombinant DNA
Bacteria and Recombinant DNA

... Fertility-(F-)plasmids, which contain only tra-genes. Their only function is to initiate conjugation. Resistance-(R-)plasmids, which contain genes that can build a resistance against antibiotics or poisons. Col-plasmids, which contain genes that code for (determine the production of) colicines, prot ...
< 1 ... 188 189 190 191 192 193 194 195 196 ... 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