AQA Biology A-Level Paper 2 Specimen QP

SPECIMEN MATERIAL AQA Biology A-Level Paper 2 Specimen QP A-level BIOLOGY (7402/2) Paper 2 Specimen 2014 Session Time allowed: 2 hours Materials For this paper you must have: • a ruler with millimetre measurements • a calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the bottom of this page. • Answer all questions. Information • The marks for questions are shown in brackets. • The maximum mark for this paper is 91. 2 Answer all questions in the spaces provided. 1 Figure 1 shows the apparatus used for measuring the rate of oxygen consumption in aerobic respiration by seeds. For the first 10 minutes, the tap attached to tube A was left open and the syringe from tube B was removed. Suggest three reasons why the apparatus was left for 10 minutes. [3 marks] 1 2 3 3 uggest and explain why the chosen temperature was 20 °C for this experiment. [2 marks] Question 1 continues on the next page