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The DNA Connection. Chromosomes are made of DNA. The DNA Code. Each chromosome contains thousands of genes. The sequence of bases in a gene forms a code. Every 3 Letters is called a CODON Code = protein. DNA carries the codes. DNA. Deoxyribonucleic Acid (DNA) Double Stranded.

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DNA

  • Deoxyribonucleic Acid (DNA)

  • Double Stranded


Dna bases
DNA Bases

  • Purines:

  • 1. Adenine (A)

  • 2. Guanine (G)




R na base pairing
RNA Base Pairing

  • A=U *Uracil

  • There is NO “T” in RNA

  • G C





RNA messenger RNA is used to “read” DNA

  • Single Stranded

  • Same bases as DNA EXCEPT instead of T RNA contains U



Translation

Translation onto a ribosome






The genetic code
The Genetic Code onto a ribosome

  • The Codon codes for which amino acid is to be made



  • Tyr


  • U A C G U U A C G


Tyr – Val – Thr


Dna mutations
DNA Mutations onto a ribosome


Substitution
Substitution onto a ribosome


Deletion
Deletion onto a ribosome


Addition
Addition onto a ribosome


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