COMMAND WORD · BIOLOGY
Find a quantity from the stimulus and show the route by which you reached it.
Where the number is, then the route, then the quantity.
Original question
An illustrative straight line passes through (0 min, 0 cm³) and (4 min, 10 cm³). Determine the rate.
Annotated answer
WhereThe two coordinates on the line. Route(10 − 0) ÷ 4. Quantity2.5 cm³ min⁻¹.
The labels match the frame. Read them in order. This is one accurate route, not the only one.
Show the route. A number with no route is a guess.
Writing “quite fast” when the question asked for a quantity.
Based on a sample question
Mark points shown after marking
Red-green colour blindness is caused by a recessive allele on the X chromosome. The diagram shows a cross.
Which children of this cross are colour blind?
(1)Determine the probability that a child of this cross is colour blind.
(2)Total for this question: 3 marks
Xn Xn and Xn Y are affected. XN Xn and XN Y are not. Two of the four children are affected, so the probability is 1/2. “Quite likely” is not a determination.
Unit 1 sample paper. Question 5 (d) asks you to determine a probability from the genetic diagram for red-green colour blindness. It is a Determine item, not a Deduce item. Sample assessment, not a live paper.
Sample paper WBI11/01, question 5 (d) (3 marks), 2017 sample assessment. Question page · Mark scheme page
