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Nucleic Acids

DNA is made up of nucleotides that contain a phosphate, base and a sugar
DNA is a polynucleotide ­ it is made up of lots of nucleotides
joined together.
Each nucleotide contains a deoxyribose sugar, a nitrogen
base and a phosphate group.
Every nucleotide has the same…

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DNA replicates itself before cell division so that each new cell has the full amount of

1 Hydrogen bonds between the two
polynucleotide strands breaks, catalysed
by DNA Polymerase. The helix unzips to
form two single strands.

2 The original single strands act as a
template for a…

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Sugar-phosphate backbone with covalent phosphodiester bonds give strength
Sequence of bases allows information to be stored and as DNA is a long molecule,
it can store large amounts of information
Complementary base pairing enables information to be replicated and transcribed
Double helix protects weak hydrogen bonds…

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The nucleotides form a polynucleotide Uracil (U) replaces Thymine (T) in RNA.
strand that is joined from the sugar of Uracil pairs up with Adenine.
one nucleotide to the phosphate of
another nucleotide.

Messenger RNA transfers the complementary DNA code out of the nucleus through a
nuclear pore to the…


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