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MODEL PAPER 6 — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 63 Marks
Question
Proteins have a primary structure. If you are given a method to know which amino acid is at either of the two termini (ends) of a protein, can you connect this information to purity or homogeneity of a protein?
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Answer

Yes. The sequence of amino acids or positional information in a protein which is a first amino acid, which is second and so on, is known as the primary structure of a protein.

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Primary structure of a portion of a hypothetical protein. N and C refer to the two termini of every protein. Single letter codes and three-letter abbreviations for amino acids are also indicated.
The difference in one amino acid will make the protein different from each other. The sequencing of a complete protein by sangers or Edman technique can tell us about the purity of a protein.

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