Pertanyaan
If a double-stranded DNA molecule is 15% thymine, what are the percentages of all the other bases?
Jawaban
Penjelasan
### DNA is a double-stranded molecule composed of nucleotides. Each nucleotide contains one of four bases: adenine (A), thymine (T), cytosine (C), and guanine (G). In a DNA molecule, adenine always pairs with thymine, and cytosine always pairs with guanine. This is known as base pairing rule.
## Step2: Calculating Adenine Percentage
### Given that the DNA molecule is 15% thymine, and adenine pairs with thymine, the percentage of adenine will also be 15%.
## Step3: Calculating the Remaining Percentage
### The total percentage of all bases in a DNA molecule is 100%. If we subtract the percentages of adenine and thymine (15% + 15% = 30%), we get 70% remaining for cytosine and guanine.
## Step4: Dividing the Remaining Percentage between Cytosine and Guanine
### Since cytosine and guanine percentages are equal (due to their base pairing), we divide the remaining 70% by 2. This gives us 35% for cytosine and 35% for guanine.
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