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Solution


Q.

Given below are two statements:                              [2025]

Statement (I): On hydrolysis, oligopeptides give rise to fewer number of α-amino acids while proteins give rise to a large number of α-amino acids.

Statement (II): Natural proteins are denatured by acids which convert the water soluble form of fibrous proteins to their water insoluble form.

In the light of the above statements, choose the most appropriate answer from the options given below:
1 Both statement I and statement II are correct  
2 Statement I is incorrect but Statement II is correct  
3 Both statement I and statement II are incorrect  
4 Statement I is correct but Statement II is incorrect  

Ans.

(3)

Statement I: Hydrolysis of proteins give α amino acids.

Statement II: Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein. When a protein in its native form is subjected to physical change like change in temperature or chemical change like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. During denaturation secondary and tertiary structures are destroyed but primary structure remains intact.

Fibrous proteins are generally insoluble in water.