Tag Archives: RNA

DNA & Heredity Transcription & Translation

Protein Synthesis Involves Transcription & Translation

  • The 2 steps of protein synthesis:
    Process Where Major Components Notes
    Transcription In the nucleus DNA gene
    RNA polymerase
    Gene is activated.
    A copy of the code is made from RNA (m-RNA)
    m-RNA leaves the nucleus, goes to cytoplasm.
    Translation In the cytoplasm, on the ribosomes m-RNA
    Ribosomes
    Peptidyl transferase enzyme
    Transfer RNAs
    Ribosome decodes the m-RNA and makes the correct protein.
  • Keeping the main copy of the genes in the nucleus protects it from damage
  • There are many DNA repair mechanisms in the nucleus

DNA, RNA & Heredity Genetic Code

Information is Stored in the Code Letters of DNA

  • All hereditary information is stored in genes, which are parts of giant DNA molecules
  • Genes code for the amino acids of proteins
  • DNA is the archival copy of the code- kept in nucleus where it is protected & repaired
  • DNA is organized with special proteins into chromosomes
  • For protein synthesis a working copy of the code is made from RNA
  • Overall scheme: DNA -> RNA -> protein
  • Another version: “One gene, one enzyme”

The Code is Based Upon the Structure of DNA

HEREDITY GENETIC CODE,RNA & DNA-TUTORIAL

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Image via Wikipedia

Information is Stored in the Code Letters of DNA

  • All hereditary information is stored in genes, which are parts of giant DNA molecules
  • Genes code for the amino acids of proteins
  • DNA is the archival copy of the code- kept in nucleus where it is protected & repaired
  • DNA is organized with special proteins into chromosomes
  • For protein synthesis a working copy of the code is made from RNA
  • Overall scheme: DNA -> RNA -> protein
  • Another version: “One gene, one enzyme”