How many strands make up a DNA double helix?
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The double helix describes the appearance of double-stranded DNA, which is composed of two linear strands that run opposite to each other, or anti-parallel, and twist together. Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain.
Explanation:
DNA is a double-stranded, helical molecule composed of nucleotides, each of which contains a phosphate group, a sugar molecule, and a nitrogenous base. ... Then, during DNA replication, the two strands in the double helix separate. This allows an enzyme called DNA polymerase to access each strand individually
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