A fragment of the coding DNA strand contains 4800 nucleotides, the share of introns in it is 30%. Determine the number

A fragment of the coding DNA strand contains 4800 nucleotides, the share of introns in it is 30%. Determine the number of nucleotides in the mature i-RNA molecule and amino acids in the protein molecule encoded in this DNA strand.

1. The number of introns is 30%, 1440 nucleotides of the total.
2. Introns (1440 nucleotides) drop out in a mature i-RNA molecule, therefore, the number of nucleotides is 4800 – 1440 = 3360.
3. The code is triplet: 3360: 3 = 1120 amino acids.

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