The molecular weight of an E coli DNA molecule is about 3.1 X10 9 g/mol. The ave

Question

The molecular weight of an E coli DNA molecule is about 3.1 X109 g/mol. The average moleculaer weight of a nucleotidepair is 660 g/mol and each nucleotide pair contributes 0.34 nm tothe length of DNA. Calculate the length of an E. coli DNAmolecule. I'm not sure how to go from mass to length. I need a hintplease..or an explanation The molecular weight of an E coli DNA molecule is about 3.1 X109 g/mol. The average moleculaer weight of a nucleotidepair is 660 g/mol and each nucleotide pair contributes 0.34 nm tothe length of DNA. Calculate the length of an E. coli DNAmolecule. I'm not sure how to go from mass to length. I need a hintplease..or an explanation

Explanation / Answer

Well it tells you how much a unit weighs and then how long aunit is which together will convert the mass to a length. 3.1 x 109g    x   mol    x   0.34nm  = 1.6 x106nm     mol             660g            1 It is a little abstract but the first two are figuring out howmany nucleotides are in the E. coli DNA and then multiplying thatby the length of a nucleotide. Good Luck

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