LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The distortion (change in shape) of enzyme molecules which occurs at high temperatures is known as
A
synthesis
B
specificity
C
replication
D
denaturation
Explanation: 

Detailed explanation-1: -Enzymes can denature (change shape) when the temperature gets too high. Enzymes can only be used once in a chemical reaction. Enzymes can denature when the pH changes. Enzymes speed up chemical reactions.

Detailed explanation-2: -Denaturation is caused by the breaking of the bonds that hold the enzyme together in its three-dimensional shape. Heat can break hydrogen and ionic bonds, which disrupts the shape of the enzyme and will change the shape of the active site.

Detailed explanation-3: -When an enzyme is denatured, it loses it native conformation, or three-dimensional structure. A denatured enzyme is unable to bind to its substrate and increase the chemical rate of reaction.

Detailed explanation-4: -Enzyme structures unfold (denature) when heated or exposed to chemical denaturants and this disruption to the structure typically causes a loss of activity. Protein folding is key to whether a globular protein or a membrane protein can do its job correctly.

Detailed explanation-5: -Enzymes are protein molecules that get denatured at high temperatures. High heat breaks hydrogen and ionic bonds leading to disruption in enzyme shape. The enzyme loses its activity and can no longer bind to the substrate.

There is 1 question to complete.