First slide

Proteins

Question

You are provided with 20 different amino acids to construct a polypeptide chain containing 100 amino acid residues. How many different polypeptide chains can be constructed ?

Moderate

A

$120$
B

${(100)}^{20}$
C

$2000$
D

${(20)}^{100}$

Solution

Number of different amino acids available to be included in the polypeptide chain= $x$ ;
Number of amino acids in each polypeptide chain= $y$ ;
Possible polypeptide chains= $x^{y}$ ;
Thus from the given data, possible polypeptide chains= ${(20)}^{100}$

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