Ch. 4 c Protein Synthesis

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Anonymous
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Ch. 4 c Protein Synthesis
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2014-02-17 16:12:07
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exam cgcc boerboom
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Questions on protein synthesis
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  1. The sequence of three nucleotide bases (A, G, T, C) is the instructions for an                       , which when combined with other sequences forms a                 , and these compose               !
    The sequence of three nucleotide bases (A, G, T, C) is the instructions for an amino acid, which when combined with other sequences forms a polypeptide, and these compose proteins!
  2. What is the step called from DNA to mRNA?
    Transcription
  3. What is the step called from mRNA to protein?
    Translation
  4. Why can't DNA leave the nucleus and what is the solution?
    The double strand on DNA is too large to fit through the nuclear pores, so it makes the single-stranded mRNA copy!
  5. What DNA nucleotide base is replaced in mRNA and what is it's replacement nucleotide?
    T (thyamine) is replaced with U (uracil)
  6. Describe how mRNA is made. What is this process called again?
    Transcription: The double stranded DNA is spliced into one strand and read by the enzyme RNA polymerase, which assembles the respective mRNA nucleotides.
  7. Describe translation
    mRNA is permitted to pass out through the nuclear pore into the cytosol with its "I'm making protein" protein cap/passport. Ribosomes read the cap to know where to begin and reads the triplets like a tape. tRNA carries amino acids to the ribosome and its sequence is matched to a sequence on the RNA. This lines the amino acids up in order
  8. What cellular machine reads the mRNA and creates protein?
    Ribosomes
  9. What is tRNA?
    Molecules similar to mRNA. Carries amino acids and uses its code to put the amino acids in the desired order

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