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(b) A polypeptide consists of 14 different amino acids. 

(i)   How many base pairs must be there in the processed mRNA that codes for this polypeptide? 

(ii)  How many different types of tRNA are needed for the synthesis of this polypeptide? 

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(b)  (i) A polypeptide containing 14 different amino acid = 14 x 3 = 42 base pairs. 

(ii) 14 different types of RNA are needed for the synthesis of polypeptide. 

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