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chealing

DNA - structure - 0 views

www.chemguide.co.uk/...dna1.html

#dna #structure ##niscsci

shared by chealing on 20 Aug 14 - No Cached
  • The diagram shows a tiny bit of a DNA double helix.
  • The full name of DNA, deoxyribonucleic acid, gives you the name of the sugar present - deoxyribose.
  • What we have produced is known as a nucleotide.
  • ...2 more annotations...
  • Have another look at the diagram we started from:
  • adenine (A) pairs with thymine (T); guanine (G) pairs with cytosine (C).
hwanjin_lee

HowStuffWorks "DNA Structure" - 2 views

science.howstuffworks.com/...dna1.htm

DNA structure

shared by hwanjin_lee on 19 Aug 14 - No Cached
  • the DNA in a cell is really just a pattern made up of four different parts called nucleotides.
  • Imagine a set of blocks that has only four shapes, or an alphabet that has only four letters. DNA is a long string of these blocks or letters. Each nucleotide consists of a sugar (deoxyribose) bound on one side to a phosphate group and bound on the other side to a nitrogenous base.
  • Watson and Crick discovered that DNA had two sides, or strands, and that these strands were twisted together like a twisted ladder -- the double helix.
  • ...2 more annotations...
  • Although it may look complicated, the DNA in a cell is really just a pattern made up of four different parts called nucleotides.
  • There are two classes of nitrogen bases called purines (double-ringed structures) and pyrimidines (single-ringed structures).
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