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If molecular weight of a polypeptide is ...

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

A

510

B

663

C

123

D

170

Text Solution

Verified by Experts

The correct Answer is:
A
Molecular weight of polypeptide = 15.kda
Molecular weight of amino acid = 90 Da
`:."No. of Amino acid in polypeptide"=(15.3xx10^(3))/(90)`
=170
`because` one amino acid is coded by = 3 Nitrogen base
`:."170 amino acid would be coded by =170xx3=510` Nitrogen base
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