BIOMOLECULES AND ENZYMES

BIOLOGY

AMINO ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which has occurred when the shape of a protein molecule is changed without the breaking of peptide bonds
A
coagulation
B
denaturation
C
gelatinization
D
hydrolysis
Explanation: 

Detailed explanation-1: -When a protein is denatured, secondary and tertiary structures are altered but the peptide bonds of the primary structure between the amino acids are left intact. Since all structural levels of the protein determine its function, the protein can no longer perform its function once it has been denatured.

Detailed explanation-2: -Denaturation is the process of altering the shape of a protein without breaking the amide bonds that form the primary structure.

Detailed explanation-3: -The function of a protein is determined by its shape. If the protein’s three-dimensional structure is disrupted due to an alteration in the structure of the amino acids, the protein gets denatured. Due to its denaturation, the protein fails to execute its function as intended.

Detailed explanation-4: -During the denaturation of proteins, the secondary and tertiary structures get destroyed and only the primary structure is retained. Covalent bonds are broken and interaction between amino-acid chains gets disrupted. This results in the loss of biological activity of the proteins.

Detailed explanation-5: -During the denaturation process of protein, the secondary and tertiary structure of protein will be changed but the peptide bond of the primary structure remains constant. Because, the denaturation reaction is not strong and its energy is not enough to break the peptide bond.

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