DNA and RNA
- Created by: jessicawarren
- Created on: 17-03-16 08:56
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- DNA and RNA
- Basics
- DNA: used to store genetic info, instructions organism needs to grow/develop
- RNA: Transfers genetic info from DNA to ribosomes for translation
- Nucleotides
- DNA: Pentose sugar= deoxyribose, phosphate group, bases A, T, C, G
- RNA: Pentose sugar= ribose, phosphate group, bases A, U, C, G
- Join to form polynucleotides
- Join in condensation reaction between phosphate group of one nucleotide and sugar of another
- Forms phosphodiester bond (phosphate group, two ester bonds)
- Sugar-phosphate backbone
- Structure of DNA
- Two polynucleotide strands joined by hydrogen bonding between bases
- Complementary base pairing
- Two hydrogen bonds between A/T, three between C/G
- Two anti parallel polynucleotide strands twist to form DNA double helix
- Structure of RNA
- Single polynucleotide chain
- Shorter than most DNA polynucleotide chains
- Contains uracil instead of thymine
- Basics
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