How many amino acids are coded for by a structural gene of 900 nucleotides?

Answer 1

I make it #300#.

One amino acid can be coded for by three nucleotides because a codon, which codes for each specific amino acid, is composed of a triplet, or three nucleotides.

Therefore for #900# nucleotides, we would make:

#(900color(red)cancelcolor(black)"nucleotides")/(3color(red)cancelcolor(black)"nucleotides""/amino acid")=300 \ "amino acids"#

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Answer 2

Julian Aguilar

300 amino acids are encoded by a 900 nucleotide structural gene.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.