Question

Участок молекулы ДНК содержит 340 адениловых нуклеотидов, что составляет 25,5% от их общего количества. Определить, сколько в данном фрагменте содержится цитидиловых, тимидиловых и гуаниловых нуклеотидов.

Answer 1

Адениловых - 25,5%

n(А) = 340

Соответственно по принципу комплементарности: А=Т, Г=Ц

Тимидиловых нуклеотидов = числу адениловых = 25,5%, n(Т) = 340,

в общем Т и А занимают 51% молекулы, всего их 680.

Гуаниловые и цитидильные нуклеотиды: оставшиеся 49% и их количество: 680*0,49/0,51 = 653. Г=Ц

Гуанина=цитозина = 653/2 = 326 целых нуклеотидов.

Т = 340

Ц = 326

Г = 326

Answer 2

Calculating the Number of Cytidine, Thymidine, and Guanosine Nucleotides in the DNA Fragment

The given DNA fragment contains 340 adenine nucleotides, which make up 25.5% of the total nucleotides. We are tasked with determining the number of cytidine, thymidine, and guanosine nucleotides in this fragment.

To solve this, we can use the fact that DNA is composed of four nucleotides: adenine (A), thymine (T), cytosine (C), and guanine (G). The percentages of these nucleotides in the DNA fragment can be calculated based on the given information.

Step 1: Calculate the Total Number of Nucleotides We can calculate the total number of nucleotides in the DNA fragment using the percentage of adenine nucleotides provided.

Given: - Adenine nucleotides: 25.5% - Total nucleotides: 100%

Using the given information, we can calculate the total number of nucleotides in the DNA fragment.

Step 2: Calculate the Number of Cytidine, Thymidine, and Guanosine Nucleotides Once we have the total number of nucleotides, we can calculate the number of cytidine, thymidine, and guanosine nucleotides based on their respective percentages.

Given: - Adenine nucleotides: 340 - Cytidine, thymidine, and guanosine nucleotides: ?

We can use the percentages of cytidine, thymidine, and guanosine nucleotides to calculate their respective quantities in the DNA fragment.

Calculation

1. Calculate the total number of nucleotides: - Total nucleotides = (100 / 25.5) * 340

2. Calculate the number of cytidine, thymidine, and guanosine nucleotides: - Cytidine nucleotides = Total nucleotides * (percentage of cytidine nucleotides) - Thymidine nucleotides = Total nucleotides * (percentage of thymidine nucleotides) - Guanosine nucleotides = Total nucleotides * (percentage of guanosine nucleotides)

Result

Based on the provided information, we can calculate the number of cytidine, thymidine, and guanosine nucleotides in the DNA fragment using the above steps.

Let's proceed with the calculations.