USF The chromosomes of the species known as Vulcans together contain 24% adenine. Apply Chargaff’s rules to calculate the percentages of thymine, guanine, and cytosine bases in their genomes, respectively. Group of answer choices 26%, 24%, 26% 76%, 24%, 76% 24%, 26%, 26% 26%, 26%, 24% 24%, 52%, 52% Not enough information has been provided to calculate the other percentages. 24%, 24%, 24%

Chargaff's stated that the DNA of any cell has the same content of purine (A and G) and pyrimidine (T and C) bases. In the DNA molecule, T pairs with A (T–A), and G pairs with C (G–C). In consequence, according to this base pair-rule, the amount of Thymine (T) should be equal to the Adenine (A), and the amount of Cytocine (C) should be equal to the Guanine (G).

In this example, the content of A is 26%, and thereby the amount of the remaining bases is: 48 % (26 + 26 = 52 >> 100 - 52 = 48), where C= 24% and G=24%.

marianaegarciaperedo marianaegarciaperedo · Answer 2 · 2021-12-02T12:51:35+01:00

In a DNA molecule, the proportion of Adenine equals the one of thymine, while the proportion of cytosine equals the one of guanine. The chromosomes contain 24% adenine, 24% thymine, 26% guanine, 26% cytosine.

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We know that in a DNA molecule, adenine pairs thymine, and cytosine pairs guanine. So,

the percentage of thymine equals the percentage of adenine

the percentage of guanine equals the percentage of cytosine

the sum of all the percentages equals 100%

In the exposed example, we know that the chromosome has 24% of adenine. So it must have 24% thymine as well.

24% + 24% = 48%

100% - 48% = 52% ⇒ This percentage corresponds to guanine and cyosine.

26% Guanine + 26% cytosine, because they must be in the same proportion.

The chromosomes of the species known as Vulcans together contain 24% adenine, 24% thymine, 26% guanine, 26% cytosine.

Options:

26%, 24%, 26% ⇒ NO

76%, 24%, 76% ⇒ NO

24%, 26%, 26% ⇒ YES

26%, 26%, 24% ⇒ NO

24%, 52%, 52% ⇒ NO

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