Each chromonemata contains

Single DNA molecule

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Double DNA molecule

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3 DNA molecule

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No DNA molecule

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Solution

The correct option is A Single DNA molecule
The ultrastructure of chromosome shows chromonema thread. The chromonema thread is DNA-histone thread or chromatin strand which forms the bulk of chromosome. A chromosome with two chromatids has two chromonemata while an anaphase chromosome has a single chromonema. The chromonema has a single double helically coiled DNA molecule.

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