SCGS Prelim 2025 Biology P2 QP

1 SINGAPORE CHINESE GIRLS’ SCHOOL PRELIMINARY EXAMINATION CANDIDATE NAME CLASS REGISTER NUMBER CENTRE NUMBER INDEX NUMBER BIOLOGY 6093/02 Paper 2 Friday, 22 August 2025 1 hour 45 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your class, register number, centre number and index number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid/tape. Section A Answer all questions. Write your answers in the spaces provided. Section B Answer one question. Write your answers in the spaces provided. 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. This question paper consists of 21 printed pages and 1 blank page. For Examiner’s Use Section A 70 Section B 10 Total 80

2 Section A Answer all questions. 1 Fig. 1.1 is a diagram of the alimentary canal in the human body. Letters A to K represent structures. Fig. 1.1 (a) State the letter from Fig. 1.1 that identifies the structure where [3] (i) alcohol is broken down .................................. (ii) egestion occurs .................................. (iii) most absorption of water occurs .................................. (b) Outline the role of structure H in the digestion of a named nutrient. [2] ……………………………………………………………………………………………... ……………………………………………………………………………………………... ……………………………………………………………………………………………...

3 (c) Disease-causing bacteria may enter the alimentary canal through contaminated food. State a letter from Fig. 1.1 to indicate the structure which acts as a barrier to these bacteria. Explain your answer. [2] ……………………………………………………………………………………………... ……………………………………………………………………………………………... ……………………………………………………………………………………………... [Total : 7]

4 2 Large quantities of plastic waste are polluting the oceans. A survey published in March 2018 showed the increase in plastic waste in the Pacific Ocean. One area of the Pacific Ocean is known as the Great Pacific Garbage Patch (GPGP). Data were collected from areas inside and outside the GPGP from 1965 to 2015 to estimate the quantity of plastic waste. The results are shown in Fig. 2.1. Fig. 2.1 (a) Describe the results of the survey from 1965 to 2015 as shown in Fig. 2.1. [3] ……………………………………………………………………………………………... ……………………………………