Question

Which of the following is the correct "exchange rate" between mRNA nucleotides and amino acids during...

Which of the following is the correct "exchange rate" between mRNA nucleotides and amino acids during the process of translation?

3 mRNA nucleotides : 3 amino acids

1 mRNA nucleotide : 1 amino acid

3 mRNA nucleotides : 1 amino acid

6 mRNA nucleotides : 3 amino acids
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Answer #1

3 mRNA nucleotides : 1 amino acid.

  • In humans it is triplet codon , in which 3 nucleotides translate to form a single amino acid. For example AUG is a start codon , which consist of nucleotides adenine , uracil and guanine , it translate into form methionine.
  • tRNA read genetic codon on the mRNA by anticodon region , and pick up aminoacid from amino acid pool by aminoacid binding region on tRNA.
  • In this way translation occur by reading the mRNA as triplet codon and form a polypeptide.
  • Option A is wrong because 3 mRNA nucleotide give 1 aminoacid
  • Option B is wrong because it require minimum 3 nucleotide to form a amino acid.
  • Option D is wrong because , in human it is triplet codon , hence 3 nucleotides gives a single amino acid ,six nucleotides translate to form 2 amino acids.
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