Question

Which of the following is not produced by the human body?
(A) Enzymes
(B) Vitamins
(C) Proteins
(D) Nucleic acids

Answer 1

Hint: Try to understand the basic meaning and functions of the classes of compounds given in option. Enzymes are bio catalysts which are created and present in the human body. We have already studied that the cell contains nucleic acids and proteins like cellulose etc are already present.

Complete step by step answer:
We have often heard that we should always have green vegetables in our diet. This is recommended by doctors as well. This is because they are a major source of vitamins which are important for the proper functioning of the organs present in the human body.
Vitamins are essential substances which cannot be created by the human body. However, they are required by the human body in minimal concentrations.
So, the correct answer is “Option B”.

The chemical reactions that take place in the body should be accelerated using a biological catalyst known as enzymes which is a protein. The enzymes will act on the substrate molecules and convert the substrate molecules into products.
For sustaining life, the metabolic processes in the body should require an enzyme catalysis in order to occur at a faster rate.
For the correct functioning of metabolism, vitamin is an essential micronutrient which is important for every organism.

Note: Although vitamins are essential, excess consumption of vitamins can have adverse effects.
Excess of vitamins can cause nausea, vomiting, gastro-intestinal upset, fatigue and mild nerve damage. Hence it is important to take vitamins as per the diet chart and doctor's prescription.