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Process of Translation

If molecular ...

Question

If molecular weight of a polypeptide is 15.3 kDa, what would be the minimum number of nucleotides in the mRNA that codes for this polypeptide? Assume that molecule weight of each amino acid is 90 Da.

A

510

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B

663

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C

123

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D

170

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Solution

The correct option is A 510
$\frac{15300}{90} = 170 a m i n o a c i d s$
One aminoacid = 1 codon = 3 nucleotides, so, 170 $\times$ 3 = 510

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