The diagram illustrates part of the arrangement of a DNA molecule and the histones attached to it. Which statement about the features labelled P, Q and R during prophase of mitosis is correct?
- AThe coiled DNA molecule forms Q and wraps around the histones of R to form small clusters held in place by histone P.
- BThe groups of histones, P, and its associated DNA, Q, move closer together as the chromosome condenses around R.
- CThe 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.
- DThe linked groups of histones P and R and the associated DNA, Q, form strands that fold and twist together to form a chromatid.