This is stored in the liver and muscles. if there is too little and blood cells burst, too much and they are damaged by crenation

Glycogen is present in the liver and muscles. If glucose is not converted to glycogen and is not disposed off to the liver, then the levels of glucose rises in the blood, causing a hypertonic environment, causing cells to burst.
The low levels of the same causes a hypotonic environment, causing blood cells to shrink, due to outward movement of water.

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.