Which of these statements is NOT true? 

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RRB JE Previous Paper 10 (Held On: 25 May 2019 Shift 2)
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  1. Proteins are inactive at low temperatures 
  2. Proteins denature at high temperature 
  3. Proteins are not affected by temperature 
  4. Proteins denature by change in pH

Answer (Detailed Solution Below)

Option 3 : Proteins are not affected by temperature 
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Detailed Solution

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Option 3 is correct, i.e. Proteins are not affected by temperature.

● Heat can be used to break the hydrogen bonds and hydrophobic non-polar interactions

● It occurs because heat increases the kinetic energy and allows the molecules to vibrate so quickly and violently that they break the bonds. The proteins in the eggs coagulate and denature while cooking.

● Hence, it implies that the heat (temperature) affects the protein.

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