Figure 2: RAPD-PCR pattern of DNA samples treated with the pharmacological substances. RAPD-PCR of Danio rerio genomic DNA after 3 days (a), 7 days (b) and 15 days of exposure (c). M= marker 100 bp ladder; 1-2 = non treated fish; 3-4 = treated with benzene ; 5-6-7 = treated with Diclofenac; 8-9-10 = treated with Carbamazepine.