Question

Total number of tripeptides possible by mixing of valine and proline is ________

Hint:

For n positions and 2 types of amino acids, the total number of combinations is 2ⁿ. Each sequence is unique and depends on the order of amino acids.

Answer 1

Correct Answer: 8

To determine the total number of tripeptides possible by mixing valine (V) and proline (P), we need to count all possible sequences of three amino acids that can be formed using these two types of amino acids. 

A tripeptide consists of three amino acids in sequence. For each position in the sequence, you have two choices: valine (V) or proline (P). Therefore, the total number of different tripeptides can be calculated as follows:

Number of choices₁ × Number of choices₂ × Number of choices₃ = 2 × 2 × 2 = 8

This means there are 8 possible combinations of tripeptides.

Let's enumerate them to verify: VVV, VVP, VPV, VPP, PVV, PVP, PPV, PPP.

Therefore, the total number of possible tripeptides is 8, fitting perfectly within the expected range of 8,8.