The diagram shows part of the organisation of a section of a DNA molecule and the associated histones, P and R, in prophase of mitosis.
Which statement about the features labelled P, Q and R during prophase of mitosis is correct?
1 )
The coiled DNA molecule forms Q and wraps around histone R to form small clusters held in place by histone P.
2 )
The groups of histones, P, and its associated DNA, Q, move closer together as the chromosome condenses around R.
3 )
The histones P and R are made of protein around which the DNA molecule, Q, is wrapped so that the DNA molecule can fit inside the nucleus.
The linked groups of histones P and R and the associated DNA, Q, form strands that fold and twist together to form a chromatid.
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