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Transcription & Translation

Transcription & Translation. How RNA Becomes a Protein. Transcription. This is the process from which mRNA makes a copy of the DNA base sequence *REMEMBER* URACIL (U) pairs with A, not T. Ex. DNA: AATCGGATT mRNA: UUAGCCUAA.

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Transcription & Translation

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  1. Transcription & Translation How RNA Becomes a Protein

  2. Transcription • This is the process from which mRNA makes a copy of the DNA base sequence • *REMEMBER* URACIL (U) pairs with A, not T. • Ex. DNA: AATCGGATT mRNA: UUAGCCUAA

  3. A group of 3 nitrogenous bases (A, U, C, G in RNA) code for one amino acid. • Each group of 3 bases is called a codon • Ex. The codon UUU results in the amino acid phenylalanine being placed in a protein

  4. Example • Use your codon table provided to determine which amino acid is being coded for: • CCA  • AGU  • GGA 

  5. Translation • The process by which the tRNA matches the appropriate amino acid to the mRNA • *NOTE* the amino acid is determined by the mRNA NOT the tRNA

  6. Start Codon • AUG  Methionine • Tells the RNA where to begin copying from the DNA • This is called the “start codon”

  7. Stop Codon • UAA  Stop • UAG  Stop • UGA  Stop • Tells the RNA where to stop copying from the DNA • Called the “stop codon”

  8. Example • In the sequence of DNA, determine the mRNA codon, find the start sequence, the stop sequence and determine the proteins involved. • *Once you find the start and stop codon on your mRNA strand, circle it* • DNA: C A T A C A AA T C T A T T G C • mRNA: • Amino Acids:

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