Statement $X$: Energy transformation always occurs in the metabolism of living organisms.
Reason $Y$: Living organisms continuously obtain energy from food.

Given below are two statements:
Statement $I$: Low temperature preserves the enzyme in a temporarily inactive state,whereas high temperature destroys enzymatic activity because proteins are denatured by heat.
Statement $II$: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme,it is known as a competitive inhibitor.
In the light of the above statements,choose the correct answer from the options given below:

$A$ mixture of oil in water forms an emulsion. If a protein is shaken up with such an emulsion,what happens?

Which of the following vitamins acts as a primary antioxidant?

The amount of usable energy,which is available for doing work,when the temperature and pressure are uniform throughout the system is called

Which of the following is the structure of glycerol?