If an mRNA molecule contains 300 codons, how many nitrogen bases does it have?
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The question cannot actually be answered. mRNA molecules contain nucleotides (each with a nitrogen base) other than those in codons - there are nucleotides in the 3' poly(A) tail, for example, as well as on the other end (the 5' UTR).
However, your teacher is probably not being that technical and is looking for the following answer:
900
Each codon consists of 3 bases, so 300 codons would have 300 * 3 = 900 bases.
However, your teacher is probably not being that technical and is looking for the following answer:
900
Each codon consists of 3 bases, so 300 codons would have 300 * 3 = 900 bases.
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So basically a codon is made of 3 nucleotide each nucleotide with 1 base.
300*3=900 bases
300*3=900 bases