Biology 9700 · AS & A Level · Control and coordination in plants

Control and coordination in plants — practice question

Fig. 1.1 illustrates part of a cell from a plant’s growing region.

(a(i))[1]

State the kind of protein that A represents.

(a(ii))[3]

Proteins B, C and D are transport proteins. Identify proteins B, C and D.

(b)[3]

Describe the changes that occur in the cell wall when large numbers of hydrogen ions enter it.

(c)[2]

Explain the consequences of an influx of potassium ions into the cell.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “auxin-binding protein / auxin receptor (protein)” …