# GATE2012-30

A single base pair of DNA weighs $1.1 \times 10^{-21}$ grams. How many picomoles of a plasmid vector of length $2750$ bp are contained in 1 $\mu$g of purified DNA?
1. $0.30$
2. $0.55$
3. $0.25$
4. $0.91$