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Biochemistry and molecular logic of life
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Master General Biochemistry – Notes, Case Studies & Practical Insights – with Rahul

Nature of genetic code

  • There are 64 codons for 20 amino acids. 61 codons are informational.
  • The codons UAA, UAG and UGA are stop signals causing chain termination and release from the ribosome of the nascent polypeptide.
  • Polypeptide chain initiation is always encoded by AUG.
  • Mutation that are simple base, substitution may be neutral.
  • Message is read in 5’ à 3’ direction.
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