why do so many genes 2030 of all genes encode transport prot

Solution

Transport proteins play a vital role in transport of ions, small molecules and other proteins avross the membranes. All these are vital for the growth and survival of the cell and organism. Some proteins are synthesized at one place but become active at another site. They must be carried to the specific site for this. For all the above functions lists number of transport proteins are necessary. Hence most genes code for these.