1cm3 cube of salt is placed into 50ml of tap water at 20°c a) the water is heated up to 40°c
b) the water has two teaspoons of salt dissolved in it before the cube of salt is added

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.