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About how long is the DNA helix in a typical mammalian cell?
AAbout 2.2 mm
BAbout 2.2 m
CAbout 22 cm
DAbout 22 m
Answer & Solution
Correct answer: B. About 2.2 m
Multiplying 6.6 x 10^9 base pairs by 0.34 nm gives roughly 2.2 metres, far longer than the nucleus.
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