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Bio unit 4
Nucleotide structure and bonds holding them
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Created by
Victor Fonseca-Barajas
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DNA has
two antiparallel
chains held together by
hydrogen
bonds between
complementary bases
(A-T & C-G)
Phosphate groups are
negatively
charged so they
repel
one another, this causes
DNA strands
to be
stiff
and
straight.
The
phosphodiester
bond is the link between
nucleosides
to form
polynucleotides
RNA is
single
stranded