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If there are 45 cytosines and 55 thymines how many guanines are there?
Wiki User
∙ 7y ago
C and G always are the same number. So since there are 45 cytosine, there has to be 45 guanine.
Since there are 55 thymine, there has to be 55 adenine since those numbers are also the same.
Wiki User
∙ 7y ago
Wiki User
∙ 14y agoCytosine always pairs up with guanine, and adenine always pairs with thymine. So, in your strand, there are 45 guanines and 55 thymines
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Assume 100 bair pair DNA double helix contains 45 cytosines. how many adenines are ther?
55. 45 cytosines would mean there must also be 45 guanines. This leaves room for 55 base pairs of adenine and thymine.
How many adenines are there when a 100 base pair DNA helix contains 45 cytosines?
I don't think the question, as it is currently phrased, is answerable. It's like saying, here's a room that contains 100 animals and those animals are dogs, cats, sheep and mice. 45 are dogs. How many sheep are there? Can't tell. Knowing the number of dogs doesn't help.BUT, if you mean if a double stranded DNA sequence is 45% cytosine, how many percent is adenine? The answer is 5%. This is because cytosine always pairs with guanidine and adenine with thymidine. So, if 45% of the DNA is cytosine, then 45% must be guanidine. Since 45%+45%=90% that leaves 10%, which has to be shared evenly between adenine and thymidine. Half of 10% is 5%, therefore 5% is adenine.
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Assume 100 bair pair DNA double helix contains 45 cytosines. how many adenines are ther?
55. 45 cytosines would mean there must also be 45 guanines. This leaves room for 55 base pairs of adenine and thymine.
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