COMMAND WORD · BIOLOGY
Draw the shape freehand, and for a graph label the axes and mark the important features without a measured scale.
Named axes, then the shape, then the feature that matters.
Original question
Sketch the rate of an enzyme-catalysed reaction against temperature. Do not plot data.
Annotated answer
AxesTemperature and rate, with no numerical scale. ShapeThe line rises, reaches a peak, then falls. FeatureThe peak is marked optimum. No points are plotted.
The labels match the frame. Read them in order. This is one accurate route, not the only one.
If no data were given, you are sketching, not plotting.
Plotting invented points at 10, 20, 30, 40 and 50.
Original practice
Mark points shown after marking
Sketch a bacterial growth curve, with time on the x-axis and the log of the number of cells on the y-axis.
(3)Draw your answer in the box below. Then press Show model answer and tick each point your drawing shows.
Draw with a mouse, finger or stylus.
Total for this question: 3 marks
Label the axes, draw a shallow lag, a steep log phase, a plateau and a fall, and name those phases. Do not add a measured scale or plotted points. If the y-axis is logarithmic, equal steps mean multiplication, not addition.
