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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Q21: Which of the following contains less than
Q21: Choose the INCORRECT statement.
A) A levorotatory isomer
Q22: Choose the INCORRECT statement.
A) Glycogen is the
Q25: Which molecule is optically active?
A)2-chlorobutane
B)1-chlorobutane
C)trans-propene
D)cis-propene
Q27: Choose the correct statement.
A)Fructose is a pentose.
B)All
Q28: Which of the following is a polysaccharide?
A)ribose
B)fructose
C)glucose
D)glycogen
E)pentose
Q29: Enantiomers ALWAYS:
A)have an asymmetric carbon
B)have different physical
Q29: Choose the INCORRECT statement.
A) A 50/50 mixture
Q39: Which of the following readily dissolve in
Q40: Choose the INCORRECT statement.
A)Two molecules that are
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