How many different combinations are possible for a tripeptide containing one of each of the following amino acids: Phe, Val, Asp?

Question

Quizplus · Accepted Answer

A tripeptide consists of three amino acids. Since there are three different amino acids (Phe, Val, Asp) and each position in the tripeptide can be occupied by any one of these amino acids, the total number of different combinations can be calculated using the permutation formula for arrangements of distinct objects, which is n! (n factorial), where n is the number of objects. Here, n=3, so the number of combinations is 3! = 3 x 2 x 1 = 6.

How Many Different Combinations Are Possible for a Tripeptide Containing