Category Archives: Transhuman News

DNA - Reminiscing A Lie (Official Video)
Written and performed by DNA Produced by Kim Entertainment https://itunes.apple.com/us/album/reminiscing/id873328818?i=873331998.

By: Fletcher Rick

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DNA - Reminiscing A Lie (Official Video) - Video

DNA GPS tracking with Dr. Eran Elhaik
It appears Ancestral Productions favorite geneticist Dr. Eran Elhaik has not only demonstrated the genetic mythology of a genetically distinct "Jewish" people: https://www.youtube.com/watch?v=hzGS...

By: Ancestral Productions

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DNA GPS tracking with Dr. Eran Elhaik - Video

Winx Fairy Dance 2 - Dna Danza La Danza Dalla A Alla Z - Pink Melody
Ecco la coreografia del gruppo Pink Melody della scuola Dna Danza La Danza Dalla A Alla Z di Udine che partecipa al concorso WINX FAIRY DANCE SECOND EDITION! Guarda il video e scatenati a ritmo...

By: Winx Club Italia

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Winx Fairy Dance 2 - Dna Danza La Danza Dalla A Alla Z - Pink Melody - Video

Msp DNA part 9
Host:https://www.youtube.com/channel/UCKSrwmLkJQLomUkxuLXg5-A.

By: delcool Pelcool

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Msp DNA part 9 - Video

Biochemistry - 25 DNA Metabolism - Flashcards
http://xelve.com Biochemistry - 25 DNA Metabolism - Flashcards Learn Biochemistry.

By: Xelve

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Biochemistry - 25 DNA Metabolism - Flashcards - Video

Team DnA Arena - Team Doc/Genny vs 25% Swedish Heritage - #3
Team DnA Arena is a vanilla Minecraft PvP Map done by the Technicube Build Team presented by Team DnA. Compete in the epic Team DnA Arena for ultimate Minecraft PvP glory. Play various game...

By: docm77

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Team DnA Arena - Team Doc/Genny vs 25% Swedish Heritage - #3 - Video

http://www.siciliatv.org -Omicidio Brunetto. Il Dna conferma identita #39; del cadavere
http://www.siciliatv.org -Omicidio Brunetto. Il Dna conferma identita #39; del cadavere.

By: TVS FAVARA

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http://www.siciliatv.org -Omicidio Brunetto. Il Dna conferma identita' del cadavere - Video

Ace Hot Pitcher - [ DnA AMV ]
All images/picture/art, music, and program information are available in the end video credits. "Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair...

By: RiRyn27

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Ace Hot Pitcher - [ DnA AMV ] - Video

DNA: the edges of the bases
If the DNA is a type of communication, how is it read. How is it turned into flesh and blood? Transcription and translation is one language, but there is another language that is just as important...

By: mrphysh

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DNA: the edges of the bases - Video

Deoxyribonucleic acid or DNA is a molecule which is the carrier of genetic information in nearly all the living organisms. It contains the biological instructions for the development, survival and reproduction of organisms. DNA is found in the nucleus of a cell where it is packaged into a compact form called a chromosome with the help of several proteins known as histones. It is also found in cell structures called mitochondria. However in case of prokaryotes DNA is not enclosed in a nucleus or a membrane but is present in the cytoplasm. The DNA in prokaryotes in generally circular and supercoiled without any histones. DNA stores genetic information as a sequence of nucleotides in special regions known as genes which are used to make proteins. The expression of genetic information into proteins is a two-stage process wherein the sequence of nucleotides in DNA is converted to a molecule called Ribonucleic acid or RNA by a process called transcription. RNA is used to make proteins by another process called translation. The human genome contains nearly 3 109 bases with around 20,000 genes on 23 chromosomes. [1]

DNA was first discovered by the German biochemist Frederich Miescher in the year 1869.[2] Based on the works of Erwin Chargaff, James Watson, Francis Crick, Maurice Wilkins and Rosalind Franklin, the structure of DNA was discovered in the year 1953. The structure of DNA is a : two complementary strands of polynucleotides that run in opposite directions and are held together by hydrogen bonds between them.[3] This structure helps the DNA replicate itself during cell division and also for a single strand to serve as template during transcription. [1]

consists of two polynucleotide chains, . The in DNA is composed of a bonded to the 5' of which is connected by a beta-glycosidic bond to a purine or a pyrimidine . The four types of bases are the two double-ringed purine base and and the two single-ringed pyrimidine bases and . Hydrogen atoms on some nitrogen and oxygen atom can undergo tautomeric shifts. The nitrogen atoms that are involved in forming tautomer appear as amino or imino groups and the oxygen atoms are either in keto or enol forms. Using an isolate thymine to illustrate the and the . There is a preference for the amino and keto forms which is very crucial for the biological functioning of DNA as it provides a with the deoxyribose and it leads to the specificity of hydrogen bonding in base pairing and thus complementarity of the chains.[4] The imino nitrogen can only serve as a donating atom in hydrogen bonding, but the amino nitrogen can also serve as a receiving atom. Each nucleotide in a DNA chain is linked to another via . There are four nucleotides in DNA. The sugar-phosphate backbone of the DNA is very regular owing to the phosphodiester linkage whereas the ordering of bases is highly irregular.[4]

A C G T

Purines Pyrimidines

The two chains in a DNA are joined by hydrogen bonds between specific bases. Adenine forms base pairs with thymine and guanine with cytosine. This specific base pairing between and is known as the Watson-Crick base pairing. The specificity of hydrogen bonding between bases leads to complementarity in the sequence of nucleotides in the two chains.[3] Thus in a strand of DNA the content of adenine is equal to that of thymine and the guanine content is equal to the cytosine content. In general DNA with higher GC content is more stable than the one with higher AT content owing to the stabilization due to base stacking interactions.

A DNA double strand can be separated into two single strands by breaking the hydrogen bonds between them. This is known as DNA denaturation. Thermal energy provided by heating can be used to melt or denature DNA. Molecules with rich GC content are more stable and thus denature at higher temperatures compared to the ones with higher AT content. The melting temperature is defined as the temperature at which half the DNA strands are in double helical state and half are in random coil state.[5] The denatured DNA single strands have an ability to renature and form double stranded DNA again.

In a the of bases which are paired to each other but are positioned at an angle. This results in unequally spaced sugar-phosphate backbones and gives rise to two grooves: the and the of different width and depth. The are on the surface of the minor groove, and the major groove is on the opposite side. The floor or surface of major groove is filled with the . The larger size of major groove allows for the binding of DNA specific proteins.[6][4]

Sources:[7]

DNA undergoes what is known as semi conservative mode of replication wherein the daughter DNA contains one DNA strand of the parent. The replication proceeds through the unwinding of double helix followed by synthesis primers from where the replication begins. An enzyme DNA polymerase synthesizes complementary strands to each parent strand from 5'-3' direction.

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DNA - Proteopedia, life in 3D - Main Page - Proteopedia ...