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Biomolecules question

2023 · 24 Jan · Shift 2 · Q15
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Biomolecules question

2023 · 24 Jan · Shift 2 · Q15

JEE MainChemistryBiomoleculesNumerical+4 / −1
Total number of tripeptides possible by mixing of valine and proline is ‾\underline{\hspace{2cm}}​
Numerical answer
View written solutionFree

Correct answer: 8

  1. A tripeptide contains 3 amino acid units joined in a sequence.

  2. Here, only two different amino acids are available:

    • Valine (V)(V)(V)
    • Proline (P)(P)(P)

  3. Each of the 3 positions in the tripeptide can be occupied by either VVV or PPP.

    So, number of possible sequences is: 23=82^3 = 823=8

  4. Listing them explicitly:

    1. VVVVVVVVV
    2. VVPVVPVVP
    3. VPVVPVVPV
    4. PVVPVVPVV
    5. VPPVPPVPP
    6. PVPPVPPVP
    7. PPVPPVPPV
    8. PPPPPPPPP

  5. Therefore, the total number of tripeptides possible is: 888

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