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Anastasy [175]
3 years ago
13

One coiled spring is shown in the diagram.

Biology
2 answers:
Bas_tet [7]3 years ago
7 0

Answer:

Backbone

Explanation:

blondinia [14]3 years ago
6 0

Answer:

Spring can be considered as backbone of the DNA.(as picture is missing there)

Explanation:

In DNA double helical model two main structure are there-

1- Backbone consist of phosphate group and the pentose sugar. It is like two vertical columns of a ladder. In helical structure two complementary stands are there one is 3' to 5' and another one is 5' to 3'.

2- Nitrogenous bases are like horizontal bars of ladder attaching two vertical strands. There are 4 kinds of nitrogenous base ADENINE , THYMINE , GUANINE , and CYTOSINE. One more nitrogenous base URACIL is also there but found in RNA not in DNA.

DNA is made of nucleotide and a nucleotide molecule is made of pentose sugar(deoxyribose) ,phosphate group and nitrogenous base.

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