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E. coli was transformed with pGFP plasmid (confers Ampicillin resistance to bacteria that take up the plasmid). After transformation, the cells were plated on nutrient agar with Ampicillin and without Ampicillin. What is the purpose of plating cells on Nutrient agar without Ampicillin? E. coli + PGFP NA without AMP NA with AMP (100 colonies) 10 colonies) Presence of colonies on this plate shows that Fool is contaminated ) Presence of colonies on this plate shows that Ampicillin works as expected @ Presence of colonies on this plate shows that E. coli is alive