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A Typical E

Question 3

Multiple Choice

A typical E. coli bacterium is a cylindrical cell about 2 μm long and 1 μm in diameter, weighing about 1.8 × 10-12 g and containing 80% water by volume. Calculate the number of lipid molecules present, assuming their average molecular weight is 688 and the lipid content is 1.9%.


A) 8.3 × 1010
B) 2.1 × 1010
C) 2.4 × 107
D) 1.6 × 109
E) 3.0 × 107

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