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Biomolecules Constituents of Life Miscellaneous

Biomolecules : Constituents of Life

Direction: ​The width of the lipid bilayer membrane is 30 Å. It is permeated by a protein which is a right handed
α-helix.

  1. The number of amino acid residues present in the protein is ​​
    1. 15 ​​
    2. 18
    3. 17
    4. 20
Correct Option: D

We know, the right handed α-helix has 3.6 residues per turn in the helix. ​​
But number of helix turns = 5.6 ​​
Therefore, No. of amino acids present in the protein = 5.6 * 3.6 = 20 ​​
Therefore, No. of amino acid residues present in the protein is 20.



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