In the context of prokaryotic cell architecture, what is the approximate mass of a single typical bacterial cell (e.g., Escherichia coli)?

• A. About $1\times {10}^{-6}$ g
• B. About $1$ g
• C. About $1\times {10}^{-18}$ g
• D. About $1\times {10}^{-12}$ g

Answer: (D)