Biology 9700 · AS & A Level · Structure of nucleic acids and replication of DNA
Structure of nucleic acids and replication of DNA — practice question
Fig. 2.1 depicts several stages of the cell cycle in the meristematic tissue at the root tip of a plant. Table 2.1 identifies three of these stages as P, Q and R.
(a)[3]
Complete Table 2.1 by giving one visible feature from Fig. 2.1 that is used to identify each stage.
(b(i))[4]
Draw a labelled diagram to show one chromosome at metaphase of mitosis. On the chromosome you have drawn, add labels to indicate: the position of a telomere; a chromatid; the centromere.
(b(ii))[1]
State the type of protein associated with DNA in chromosomes.
(b(iii))[3]
Describe how the spindle takes part during mitosis.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Chromosomes scattered irregularly” …