Four.
Four copies of a DNA molecule result from two replications of a single DNA molecule. This is because each replication results in two identical daughter molecules.
Four.
Four.
Four.
Four.
Four.
Four.
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Four.
A mutation
Yes, a particle can be a single molecule.
A single helix molecule is a molecule that has a spiral shape resembling a single coil or spring. One common example is the DNA molecule, which consists of a single helix structure formed by its two intertwined strands.