There are 61 mRNA codons that specify an amino acid, but only 45 tRNAs. This is best explained by the fact that
Amino acid could be expressed by more than one codon
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A particular triplet of bases in the coding sequence of DNA is AAA. The anticodon on the tRNA that binds the mRNA codon is
UUU
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How many nucleotide does the tRNA carries ?
3
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D
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seesaw
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fairy
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fairy
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banana
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A changing which parts of RNA is likely to be most damaging to a cell?
Exons
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What is the function of poly-A tail on 3' end of the mRNA
Stabilizing the mRNA
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lifesaver
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rocket
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gift
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thief
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What are polyribosomes?
groups of ribosomes reading a single mRNA simultaneously
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it carries a specific amino acid , what is it ?
tRNA
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How does the mRNA leave the nucleus ?
nuclear pore
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A transfer RNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing polypeptide on the other tRNA (#2) in the ribosome already.
E site
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A transcription unit that is 8,000 nucleotides long may use 1,200 nucleotides to make a protein consisting of approximately 400 amino acids. This is best explained by the fact that