Question

На месте обозначенном Х, в двойной спирали ДНК должен стоять нуклеотид 1-я цепь: Т Г Ц Ц Т А Т Г А Ц 2-я цепь: А Ц Г Г А Х А Ц Т Г Г Ц Т А

Answer 1

По принципу комплементарности А=Т ; Г=Ц

На месте Х должен стоять нуклеотид тимин (Т),так как комплементарен Аденину (А)

1-я цепь: Т Г Ц Ц Т А Т Г А Ц
2-я цепь: А Ц Г Г А Т А Ц Т Г

ОТВЕТ:     Т (тимин)

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Answer 2

The Sequence of Nucleotides in the DNA Double Helix

The given sequence of nucleotides in the DNA double helix is as follows:

1st strand: T G C C T A T G A C 2nd strand: A C G G A X A C T G G C T A

It is important to note that the letter "X" is used to denote an unknown nucleotide in the second strand.

The DNA double helix consists of two strands that are complementary to each other. The nucleotides in DNA are represented by four different bases: adenine (A), thymine (T), cytosine (C), and guanine (G). In DNA, adenine always pairs with thymine, and cytosine always pairs with guanine. This pairing is known as base pairing.

Based on the given sequence, we can determine the missing nucleotide in the second strand by applying the rules of base pairing. Since adenine (A) always pairs with thymine (T), the missing nucleotide in the second strand must be thymine (T). Therefore, the complete sequence of nucleotides in the second strand is:

2nd strand: A C G G A T A C T G G C T A

Please note that this is a simplified explanation of DNA structure and base pairing. For a more detailed understanding, it is recommended to refer to reliable sources on genetics and molecular biology.