DNA and RNA have completely different purposes in us. DNA stores and transfers genetic information (Eye and hair colour, skin colour, etc..). RNA codes amino acids and makes proteins. DNA is double stranded while RNA is single stranded. DNA uses adenine, thymine, cytosine, and guanine; while RNA uses adenine, cytosine, uracil, and guanine.
Tissue culture is the growth of tissues or cells in an artificial medium separate from the parent organism, whereas grafting is a horticultural technique whereby tissues of plants are joined so as to continue their growth together.
