Question

9. Most of the genes in the human genome code for enzymes. Why? What are the functions of enzymes?

Answer 1

ANS. Genome - It is the complete set of DNA including all its genes that are protein encoding sequence and other DNA sequence. Gene is the unit of heredity which is itself made up of DNA . In case of human genome only 1.5% of our DNA encodes for protein ,about 20,300 genes encoding protein . Most of these proteins function as enzymes as we know enzymes are the protein catalyst means they speed up the rate of chemical reaction without being consumed .Most of the genes in human genome code for enzymes because in our body  at any moment millions of chemical reactions are taking place which are not possible without these enzymes or their rate would be extremely slow without these enzymes .For a variety of process to take place in our body a number of  variety of enzymes are needed hence ,most of our genes encode for enzymes . Examples in digestion enzymes like amylase ,lactase , lipase,maltase are involved without them digestion process in not possible .