A set of thorough and concise notes created and used by an A* grade student to revise Nucleic acids (ch 2 from the A Level AQA Biology course). The notes are detailed and clearly explain the topic by breaking each process down into steps. It includes clear and detailed diagrams and includes all con...
Summary Biology For Aqa Student Book - Unit 1 - Protein structure
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AQA
A Level Biology
Unit 1 - Biological molecules
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2.1 Structure of RNA
and DNA
,Nucleotide structure
• 3 main components:
• Pentose sugar
• Phosphate group
• Organic bases (A, C, T, G, U)
• They form during condensation reactions
• Nucleotides join into dinucleotides via condensation also, making a
phosphodiester bond between a phosphate and a pentose sugar
• These are linked into polynucleotide chains e.g. RNA and DNA
, RNA structure
• Single polynucleotide chain [short]
• Sugar is ribose
• Bases are adenine & uracil, and cytosine &
guanine
• 3 types:
• 1 transfers genetic info from DNA to
ribosomes
• 2 makes up ribosomes along with proteins
• 3 is in protein synthesis
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