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DNA is a double helix consisting of two strands orientated in an _antiparallel_ configuration meaning the 5' to 3' direction of one strand runs counter to direction of the other strand.
How is DNA composed?
DNA is a nucleic acid.
Nucleic acids are linear polymers composed of nucleotides joined by their extremes.
Nucleotides are monomers composed of
- a sugar,
- a phosphate group, and
- a nitrogenated base.
Nitrogenated bases are adenine, guanine, cytosine, and thymine
These nucleotides together compose a strain or a helix.
A DNA molecule is composed of two parallel strains.
The bases of each strain pair the bases of the other strain,
- Adenine pairs with thymine,
- Guanine pairs with cytosine.
The direction of these strains in the molecule is opposite to each other, which means that they are antiparallel to each other.
DNA is a double helix consisting of two strands orientated in an _antiparallel_ configuration meaning the 5' to 3' direction of one strand runs counter to direction of the other strand.
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