Broadrick_2019_Bio_Prelim_P2_QP

1 This question paper consists of 19 printed pages including this page. [Turn over Name Class Index Number BROADRICK SECONDARY SCHOOL SECONDARY 4 EXPRESS PRELIMINARY EXAMINATION 2019 BIOLOGY Paper 2 Theory Candidates answer on the Question Paper No Additional Materials are required. 6093/02 Sep 2019 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your name, index number and class on the work you hand in. You may use an HB pencil for any diagrams, graphs, tables or rough working. Write in dark blue or black pen. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions. Section B Answer all the questions. Question 9 is an Either/Or question. Write your answers in the spaces provided on the Question Paper. You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B. Candidates are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. The number of marks is given in brackets [ ] at the end of each question or part question. For examiner’s use P2 / 80 www.KiasuExamPaper.com 166

2 6093/2/9/19 [Turn over] Section A (50 marks) Answer all the questions in the space provided. 1( a ) Define the term translocation. [2] ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. (b) The figure below shows a scanning electron micrograph of a type of vascular tissue found in plants. Fig 1.1 www.KiasuExamPaper.com 167

3 6093/2/9/19 [Turn over] (i) Name the vascular tissue. [1] ………………………………………………………………………………………….. (ii) With reference to Fig. 1.1, describe two ways that these vascular tissues are adapted to their functions. [2] ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. (c) Some weedkillers stop the plant from photosynthesising. These a re often applied to the soil where the weeds are growing. Explain how the weedkiller reaches its site of action in the leaves. [4] ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. [Total:9m] 2( a ) State what is meant by the term ‘activation energy’. [1] ………………………………………………………………………………………….. ………………………………………………………………………………………….. www.KiasuExamPaper.com 168

4 6093/2/9/19 [Turn over] (b) Fig 2.1 shows a section of photographic film. The top layer is made of silver particles embedded in a layer of gelatine which is a type of protein. Fig 2.1 In an investigation, a 20 mm length of photographic film was placed in each of three boiling tubes. x The film was immersed in 20cm3 water. x 1 cm3 of liquid at diff