Question

The number of possible unique combination(s) of linear tetrapeptides that can be made from four different amino acids using each amino acid only once in the chain is/are _____.

Answer 1

Correct Answer: 24

To solve the problem of finding the number of unique combinations of linear tetrapeptides formed from four different amino acids, we need to consider permutations of the amino acids. Since each amino acid is used only once, we're looking for the number of permutations of 4 unique items (the amino acids).

Mathematically, the number of permutations of n distinct items is given by the factorial of n, denoted as n!. In this case, n = 4, so we calculate:

4! = 4 × 3 × 2 × 1

= 24

This calculation confirms there are 24 unique ways to arrange four different amino acids into a linear tetrapeptide chain. Each arrangement represents a unique sequence, ensuring no repetition of amino acids within the tetrapeptide. Therefore, the number of possible unique combinations of tetrapeptides aligns with the provided range of 24,24. Hence, the solution is correct and verified.

Solution: 24 unique combinations.