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Home Q & A Board Biology-Related Homework Help Cell Biology
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firestrike firestrike
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Posts: 63
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11 years ago
Cytosine makes up 38% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
1) 12
2) 24
3) 31
4) 38
5) It cannot be determined from the information provided
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RLC
wrote...
#1
11 years ago
5
wrote...
#2
11 years ago
cytosine always pairs with guanine so c=g so 38 +38=76 percent is g+c. so 100 percent - 76 percent means that Adenine and thymine have 24 percent left. Since A=T 24/2 is = 12

the answer is 1
wrote...
#3
11 years ago
C & G = 76%

A & T = 24%

T = 12%
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