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  4. Starting with three different amino acid molecules, how many different tripeptide molecules can be formed?

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Q. Starting with three different amino acid molecules, how many different tripeptide molecules can be formed?

NTA AbhyasNTA Abhyas 2022

Solution:

From three different amino acid molecules, six different tripeptide molecules are formed.
Consider three different amino acids $A,B$ and $C.$ The tripeptide molecules possible are as follows:
$A-B-CA-C-B$