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nucleic acids biology summary

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AS Unit F211 - Cells, Exchange and Transport
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summary on topic of nucleic acids in module 2 of a level biology including protein synthesis, dna semi-conservative replication, DNA, RNA

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Nucleic acids
BIOLOGY
___


Notes

DNA

Purines : A, G

Double carbon ring structure

Pyrimidine : T, C (U in RNA)

Single carbon ring structure

Base pairing

● Small pyrimidine binds with large purine (constant distance btw DNA backbones =
parallel polynucleotide chains)
● DNA has equal amounts of A + T and C + G
● 2 strands held together through hydrogen bonding btw complementary bases
● 2 anti-parallel polynucleotide strands twist




● PO₄ ³- at C5 of pentose sugar forms a phosphodiester bond (covalent) with OH group at
C3 of other nucleotide
● Sugar-phosphate backbone
● Catalysed by DNA polymerase

,

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Study Level
A/AS Level
Subject
Biology
Uploaded on
May 26, 2024
Number of pages
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Written in
2023/2024
Type
Summary
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Subjects

  • nucleic acids
  • dna
  • rna
  • protein synthesis
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