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Transcription. Define the following. Messenger RNA Ribosomal RNA Transfer RNA Transcription Codon. Morse Code. Genes and Proteins. Read on pg. 294 what role proteins play How does DNA factor in?. RNA. 3 chemical differences between DNA and RNA 1. Single strand

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  1. Transcription

  2. Define the following • Messenger RNA • Ribosomal RNA • Transfer RNA • Transcription • Codon

  3. Morse Code

  4. Genes and Proteins • Read on pg. 294 what role proteins play • How does DNA factor in?

  5. RNA • 3 chemical differences between DNA and RNA • 1. Single strand • 2. Sugar in RNA is ribose • 3. Uracil (U) instead of thymine (T) • “U R single”

  6. Three types of RNA • Messenger RNA (mRNA) • Ribosomal RNA (rRNA) • Transfer RNA (tRNA)

  7. Messenger RNA (mRNA) • RNA that transports information from DNA in the nucleus to the cell's cytoplasm

  8. Ribosomal RNA (rRNA) • RNA that makes up the ribosomes; • Clamps onto mRNA and • Uses it’s information to assemble amino acids in the correct order

  9. Transfer RNA (tRNA) • RNA that transports amino acids to the ribosomes to be assembled into proteins

  10. Transcription • Process in the cell nucleus where enzymes make an RNA copy of a DNA strand • 1. Enzymes unzip the molecule of DNA • 2. RNA nucleotides pair with complementary DNA nucleotides on a DNA strand

  11. Transcription cont… • AGC TAA CCG • UCG AUU GGC • GACAAGTCCACAATC • CUGUUCAGGUGUUAG

  12. Transcription cont… • 3. mRNA molecule breaks away as the DNA strands rejoin • mRNA leaves the nucleus and enters the cytoplasm

  13. Page 297

  14. Page 297

  15. Amino Acids

  16. The Genetic Code • 4 nitrogen bases make up 20 amino acids (64 combos) • This is the genetic code • Separated into codons • Set of three nitrogen bases that codes for an amino acid

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