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DNA percentage question

Gamewizard
in Homework Help

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Hi guys,

 

I am not really sure on how to answer these type of questions, i knw there would be a formula/method to calculate them, :confused:

 

 

When the base composition of DNA from 'an organism' was determined, 16% of the bases were found to be adenine-

what is the percentage of cytosine?

what is the entire % base composition (% of A, T,C, G) of the DNA?

 

any ideas

so you know the pairing rule, there's only two combinations, knowing one of them gives you another.

well, you have percentage of adenine. from which you can assume directly the percentage of adenine pairing mate. the rest would be the others.

  • 2 weeks later...

Agreed with the above. This is also a clue but you have to do your own reading:

Specific Base-Pairing

 

The base-pairing mystery had been partly solved by the biochemist Erwin Chargoff some years earlier. In 1949 he showed that even though different organisms have different amounts of DNA, the amount of adenine always equals the amount of thymine.

 

http://nobelprize.org/educational_games/medicine/dna_double_helix/readmore.html

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