1. Concentration of Dna solution = 30 X 10-9 g / 200
X 10-6 l
                                                  Â
= 0.15 X 10-9 X 106 g/l
                                                  Â
= 0.15 X 10-3 g/l
                                                  Â
= 150 g/l or 150 µg / µl
2. 30 X 10-9 g contains ------------ 200 X
10-6 l
    2 X 10-9 g contains
--------------Â Â Â Â X liter
X = (2 X 10-9 g X 200 X 10-6 l ) / 30 X
10-9 g
X= 400 X 10-6 / 30l
X= 400 X 10-6 / 30l
X = 13.33 µl required for PCR reaction
