What Are the Nucleotide Percentages in This Gene?

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The discussion focuses on calculating nucleotide percentages in a gene based on given data. The gene is 4080 A° long with 3120 hydrogen bonds, and it contains 240 adenine nucleotides, with cytosine making up 40% of the total nucleotides. There is confusion regarding the use of the term "chromatid," suggesting it may be a misinterpretation of the question. A proposed calculation method indicates that the total number of nucleotides is 2400, leading to further calculations for guanine and thymine. The conversation emphasizes the need for clarity in the question's phrasing to ensure accurate calculations.
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1. A gene of length 4080 A° has 3120 hydrogen bonds. On one chromatid of one gene, there are 240 nucleotides of adenine, and 40% of total nucleotides are cytosine. Calculate each nucleotide percentage in the gene.

Homework Equations


3. Set L be the length of DNA, so L=\frac{N}{2}3.4
we then have N=2400.
Because C_1=G_2=0.4N=960
and A_1=T_2=240
we have A_2+C_2=1200
In a DNA we also have ∑Hbonds=2A+3G=2(A_1+A_2)+3(G_1+G_2)=3120
or 480+2A_2+3G_1+2880=3120
or 2A_2+3G_1=-240

:cry: It's an incorrect approach...:cry:
 
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Medicol said:
On one chromatid of one gene, there are 240 nucleotides of adenine, and 40% of total nucleotides are cytosine.
I suspect what the question tried to say here is that one strand of the gene (e.g. the coding strandt) has 240 nt of adenine and 40% of the total nts are cytosine. If that was what the questioner meant, chromatid is the incorrect term to use. I'd double check with whomever was the source of the question, however.
 

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