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DNA characteristics

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Knowing DNA

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DNA characteristics

Knowing DNA

Tania Herrera
1

sugars phosphate Triplex circular proteins hydration Hydrogen expression third nitrogenous thymine quadruplex bases 4 naked pH mutations Motif oligonucleotides immunoglobulin two Z DNA plasmids eukaryotic regulation mitochondria nucleus cytosine prokaryotic A

All cellular organisms , both and eukaryotic , have Deoxyribonucleic Acid double - stranded ( ) as their inherited molecule . In cells , DNA is found in the and a small amount in and chloroplasts . In prokaryotic cells is closed , and it has small rings called .
The DNA molecule consists of strands that together form a double helix structure . Each chain has a central part made up of ( deoxyribose ) and groups . Attached to each sugar is following 4 : adenine , , guanine , and . The two chains are held together by links between bonds . The sequence of these bases along the chain is what encodes the instructions for making and RNA molecules .
Exist 5 forms of DNA , according to the characteristics that differentiate them and the genetic processes . The and B DNA are related to cell . The - DNA is related to reading of the bases an alteration in the sequence affects the and genetic recombination . DNA is related to a strand attached to the of the original strands and affect transcription and recombination , causing . The Q - DNA , is related to the hydrogen bonds of guanine , plays an important role in the functioning of , its effects are still controversial . Finally , i - DNA is composed of chains interspersed in the cytosine pairs , it is susceptible to changes in the of the cell and its function is the and gene expression .