Question

Какое строение будет иметь участок молекулы ДНК, если известно, что участок одной цепи ДНК имеет следующий состав: ГГГААЦТТТЦАААЦА? Какие связи и сколько образуется между азотистыми основаниями гуанином и цитозином?

Answer 1

ГГГ  ААЦ  ТТТ  ЦАА  АЦА
про  лей    лиз  вал    цис

между Г и Ц имеются водородные связи всего их три

Answer 2

Structure of DNA molecule:

The DNA molecule consists of two strands that are twisted together to form a double helix structure. Each strand is made up of a long chain of nucleotides. A nucleotide is composed of three components: a sugar molecule called deoxyribose, a phosphate group, and a nitrogenous base. The nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G).

In the given sequence of one DNA strand: ГГГААЦТТТЦАААЦА, we can see that the bases are represented by the letters G, A, C, T. Therefore, the structure of the DNA segment can be represented as follows:

G-G-G-A-A-Ц-Т-Т-Т-Ц-А-А-А-Ц-А

Each base on one strand of DNA is paired with a complementary base on the other strand through hydrogen bonding. Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C). This pairing is known as base pairing.

Bonding between guanine and cytosine:

Guanine (G) and cytosine (C) form a specific base pair in DNA. They are connected by three hydrogen bonds, making it a stronger bond compared to the two hydrogen bonds between adenine (A) and thymine (T). The hydrogen bonds between guanine and cytosine contribute to the stability and structure of the DNA molecule.

Therefore, in the given DNA sequence, the number of hydrogen bonds formed between guanine and cytosine would be three.

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