Interpretation:
The number of different ways to arrange three different amino acids, four different amino acids and, five different amino acids in a peptide should be determined.
Concept introduction:
Proteins are
They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.
The mathematical expression for calculating number of different ways for arranging amino acids:
Number of different ways to arrange amino acids =
Where, n = number of amino acids
Answer to Problem 47A
Number of different ways to arrange three amino acids = 8000
Number of different ways to arrange four amino acids = 160000
Number of different ways to arrange five amino acids = 3200000
Explanation of Solution
Number of different ways to arrange amino acids =
Three different amino acids:
Value of n = 3
Thus,
Number of different ways to arrange three amino acids =
=
Four different amino acids:
Value of n = 4
Thus,
Number of different ways to arrange four amino acids =
=
Five different amino acids:
Value of n = 5
Thus,
Number of different ways to arrange five amino acids =
=
Chapter 23 Solutions
Chemistry: Matter and Change
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