PLMGS 2016 Bio Prelim P2 QP

[Turn over CANDIDATE NAME CLASS CLASS INDEX NUMBER CENTRE NUMBER INDEX NUMBER BIOLOGY (SPA) 5158/02 Paper 2 1 9 A u g u s t 2 0 1 6 Moles, Rates of Reactions, Energy Changes 1 hour 45 min READ THESE INSTRUCTIONS FIRST Write your name and index number on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Section A Answer all questions in the spaces provided in the question paper. Section B Answer all three questions, the last question is in the form either/or. Write your answers on the lined paper in this booklet and, if necessary, continue on separate answer paper. At the end of the examination, submit Section A and B separately. The number of marks is given in brackets [ ] at the end of each question or part question. _______________________________________________________________________________ This paper consists of 17 printed pages including the cover page. For Examiner’s Use Section A Section B 6 7 8 Total Paya Lebar Methodist Girls’ School (Secondary) Preliminary Examination 2016 Secondary 4 Express 508 trendyline___________________________________________________________________________________________________________ This paper consists of This paper consists of 177 printed pages including the cover pprinted pages including the cover p d

2 Section A [50 marks] Answer all questions in this section. Write your answers in the spaces provided. 1 Fig. 1.1 shows a type of plant cell. Fig.1.1 (a) Fig. 1.1 shows the lower surface of a leaf. Label P, Q and R. [3] P :…………………………………...………………………….………………………………. Q :…………………………………...………………………….………………………………. R :…………………………………...………………………….………………………………. (b) Fig. 1.2 below shows the enlarged diagram of Cell Q. Fig. 1.2 509 trendylineFig. 1.2. 1.2

[Turn over 3 (i) During the day, potassium pump moves K+ ions into Cell Q from surrounding cells while at night the potassium pump removes K+ ions out of Cell Q into surrounding cells. Describe and explain how that helps structure R to remain open or close. Open …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… ……………..………..……………………………………………………………….……......[2] Close: …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… ……………..………..……………………………………………………………….……......[2] (ii) Describe and explain how Cell Q is adapted for its function. …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...………………………….………… …………………..…..……………………………………...