With 20 amino acids, the number of possible polypeptides exactly 10 amino acids in length is given by: A)10 × 20. B)10²⁰. C)20¹⁰. D)10 × log(20).

Question

Quizplus · Accepted Answer

The number of possible polypeptides exactly 10 amino acids in length is given by: 20¹⁰ = 20 × 19 × 18 × 17 × 16 × 15 × 14 × 13 × 12 × 11 = 20!/10! = 20 × 19 × 18 × 17 × 16 × 15 × 14 × 13 × 12 × 11 = 6,189,700,683,339,120 Therefore, the best choice is C (20¹⁰).

With 20 Amino Acids, the Number of Possible Polypeptides Exactly