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505769
RNA
Description
A-level BIOL5 Mind Map on RNA, created by prettypriyaz on 25/01/2014.
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biol5
biol5
a-level
Mind Map by
prettypriyaz
, updated more than 1 year ago
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Created by
prettypriyaz
over 10 years ago
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Resource summary
RNA
DNA code are transcribed onto a single stranded molecule called ribonucleic acid.
DNA is confined into the nucleus and it cannot move
messenger RNA (mRNA)
acts as a messenger
transfers the DNA code from the nucleus to the cytoplasm
long strand that is arranged in a single helix
small enough to leave the nucleus through the nuclear pore and to enter cytoplasm
associates with ribosomes.
Genetic code refers to the sequence of nucleotide bases on mRNA
*Degenerate code- most amino acids have more than one codon,
*Universal- same codon codes for same amino acids in all organisms.
*Non overlapping- each base in the sequence read only once. Eg. 123 456 and not 123 345
*Few amino acids have only a single codon
Three codons do not code for amino acid. E.g stop
mRNA code is complementary to the DNA code
Codon refers to the sequence of three bases (triplet) on mRNA that codes for a single amino acid
Structure
Sugar- Ribose
(A) pairs up with (U)
Anticodon- which can base pair up with codon
(C) pairs up with (G)
Phosphate group
is a polymer made up of repeating mononucleotides subunits.
tRNA
clover- leaf shape
part of tRNA molecules, which amino acids can easily attach
small molecules made up of 80 nucleotides
Media attachments
trna-1__1_.gif (image/gif)
images__1_ (image/jpg)
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