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20 Cards in this Set
- Front
- Back
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Prokaryotic ribosomes are ? in size and composed of a ? subunit + ? subunit
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70s
50s+30s |
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Eukaryotic ribosomes are ? in size and composed of a ? subunit + ? subunit
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80s
60s+40s |
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The small subunit of the ribosome binds to the ? end of the mRNA
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5'
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The large subunit of the ribosome supplies ? for making peptide bonds on the protein.
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enzymes
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The ribosome scans the mRNA by moving in the ? to ? direction along the mRNA.
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5' to 3'
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The first codon on the mRNA is called the ? codon and is almost always ? which codes for the amino acid ?
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start
AUG methionine |
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With the mRNA message in place on the ribosome, the ? then enter with their ?
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tRNA
amino acid |
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The 3 sites on the ribosome that hold the tRNA during processing are ?
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E
P A |
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The three base mRNA codons code for a specific ?
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amino acid
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Their is ? in the genetic code which is when a particular amino acid can be coded for by more than a single codon and this helps prevent ?
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redundancy
errors |
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The ? effect is when only two codons are all that is required to code for an amino acid and the third does not change the amino acid coded for.
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wobble
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The termination of protein synthesis is brought about by the presence of a ? codon usually ? or ?
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stop/termination
uaa,uga,uag |
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Stop/termination codons do not code for ?
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tRNA
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Before a new protein is released from the ribosome it starts to fold upon itself to achieve its biologically active ? conformation
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tertiary
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? translation modifications may be necessary and they can include, the starting amino acid may be ? off, co-factors like ? can be added and they can be joined to other proteins to form ? level structures
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Post
clipped Metal ions quaternary |
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The start codon for transcription and translation is the same ? but it codes for a different form of ?
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AUG
methionine |
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Eukaryotic mRNA codes for just ? protein
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one
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Why can't eukaryotic transcription and translation be simultaneous?
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transcription takes place in the nucleus of Eukaryotes and prokaryotes do not have a nucleus and translation take place in the cytoplasm of eukaryotes
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? mRNA in eukaryotes must pass through pores in the nuclear membrane and be carried to the ribosome in the cytoplasm for translation
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modified
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? are sequences of bases that do not code for protein.
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Introns
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