Question

якщо дволанцюгова ДНК містить 22 % гуаніну, то який відсоток припадатиме на аденін?

Answer 1

Загальна кіл-ть нуклеотидів - 100%
Кіл-ть гуаніну - 22%

Так як гуаніну комплементарний цитозин, то його відповідно також буде 22%

100%-(22%+22%)=56% припадає на аденін та тимін.
Так як аденін на тимін комплементарні один одному, іх також буде порівну: по 28%
Отже, на аденін припадатиме 28%

Answer 2

DNA Composition Calculation

If a double-stranded DNA molecule contains 22% guanine (G), we can calculate the percentage of adenine (A) it contains using Chargaff's rules. According to Chargaff's rules, in a double-stranded DNA molecule, the amount of adenine is equal to the amount of thymine (T), and the amount of guanine is equal to the amount of cytosine (C).

Calculation Process

To calculate the percentage of adenine (A), we can use the following steps:

1. Since guanine (G) and cytosine (C) are complementary, they will each make up 22% of the DNA molecule. 2. Therefore, the total percentage of guanine (G) and cytosine (C) together is 44% (22% + 22%). 3. According to Chargaff's rules, the percentage of adenine (A) and thymine (T) together will also be 44%. 4. As adenine (A) pairs with thymine (T), the percentage of adenine (A) will be half of the total percentage of adenine (A) and thymine (T), which is 22% (44% / 2).

Therefore, if a double-stranded DNA molecule contains 22% guanine (G), then the percentage of adenine (A) will also be 22%.

This calculation is based on Chargaff's rules, which state that in a double-stranded DNA molecule, the amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine.