Q.

Different types of enzymes are present in our body because:

(i) each enzyme has a specific function
(ii) each enzyme has a specific substrate
(iii) it makes the metabolic process faster
(iv) it makes the replacement of the defective enzymes easy

1 (i) and (ii)  
2 (iii) and (iv)  
3 (i) and (iv)  
4 All of these  

Ans.

(1)

Each enzyme has a specific substrate and has a specific function to perform. Each enzyme is a protein and each protein is made by a specific gene.