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Transcription and Translatio n

Transcription and Translatio n. Remember:. DNA  RNA  Protein. Practice:. What is the complimentary strand of DNA? A C G A C T G C C. Remember A with T C with G. Practice: What is the mRNA strand for this sequence of DNA?.

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Transcription and Translatio n

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  1. Transcription and Translation

  2. Remember: • DNA •  • RNA •  • Protein

  3. Practice: • What is the complimentary strand of DNA? • A C G A C T G C C Remember A with T C with G

  4. Practice: What is the mRNA strand for this sequence of DNA? • DNA: A C G C T T A • mRNA:

  5. The ultimate goal is to create proteins that the body can use!

  6. Transcription: (In the nucleus) • Uses Messenger RNA (mRNA) • RNA is always single stranded! • mRNA copies one side of DNA • mRNA carries this “message” to ribosomes where proteins are made

  7. mRNA • Thymine is replaced with Uracil (U) • Example: • DNA strand: A T C G G T A T • mRNA strand: U A G C C A U A

  8. Translation • Process where RNA is used to make proteins • Uses: • mRNA • transfer RNA (tRNA) • ribosomal RNA (rRNA)

  9. Transfer RNA • After the messenger RNA leaves the nucleus, it finds a ribosome • tRNA will then bring the correct amino acid to the ribosome to create a chain of proteins • Example: mRNA: A C G U U A tRNA: U G C A A U

  10. DNA strand: A T C G G A • mRNA strand: U A G C G U • tRNA strand: A U C G C A

  11. Amino Acids are the building blocks of proteins • 3 Nucleotides makes one amino acid • Using mRNA: • ACC, UCG, UUU, AUC

  12. A codon is a specific amino acid • There are only so many combinations you can make with the four letters (AUCG)

  13. Codons • The start codon signals for the amino acid “Methionine” • This tells the sequence where to start • There are three codons that signal an end to a sequence • These do not code for anything, just to stop

  14. Use the mRNA sequence to figure out the codons! • Example: • DNA strand: A T G C G A • mRNA strand: U A C G C U • Codons: Tyrosine Alanine

  15. Practice: • DNA Strand: A C G A T C T • mRNA strand: • tRNA strand: • Codon:

  16. Strings of Amino acids make up Proteins!!!!

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