SGSS Pure Biology Prelim 2024 Paper 1

St. Gabriel’s Secondary School 2024 ‘O’ Preliminary Examination Subject : Biology Paper : 6093 / 1 Level/Stream : Sec 4 Express Duration : 1 hour Date : 28 August 2024 Setter : Ms Jane Zhou Additional material: Multiple Choice Answer Sheet ▪ Section B: Answer one question. ▪ You are advised to spend no longer than 50 minutes on Section A. INFORMATION FOR CANDIDATES The number of marks of each part-question is shown in brackets. This question paper consists of 22 printed pages including this cover page. Name: …………………………………………… ( ) Class: Sec ……………… READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, index number and class on the Multiple Choice Answer Sheet. There are forty questions in this question paper. Answer all questions. For each question, there are four possible answers: A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the Multiple Choice Answer Sheet. Read the instructions on the Multiple Choice Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate.

2 SGSS/BIOP1/4EPrelim/2024 1 Which of the following structures has both cytoplasm and cell wall? A root hair cell B xylem vessel C red blood cell D platelet 2 Which structures listed below are found in both a typical animal cell and a typical plant cell? 1 centrioles 2 chloroplast 3 Golgi apparatus 4 mitochondria 5 ribosome A 3 and 5 B 1, 2 and 3 C 2, 3 and 4 D 3, 4 and 5

3 SGSS/BIOP1/4EPrelim/2024 3 Membranes within and at the surface of cells have different roles. Which of the outcomes correctly identifies the organelles that possess the membrane and function concerned? outcome 1 outcome 3 outcome 4 outcome 6 A chloroplast smooth ER rough ER mitochondrion B nucleolus vesicle smooth ER mitochondrion C nucleus vesicle smooth ER chloroplast D nucleus mitochondrion rough ER chloroplast membrane encloses cell contents cell surface membrane encloses a structure within the cell possesses pores no pores present single membrane double membrane allows exit of mRNA 1 protein synthesis 2 transports enzymes 3 lipid synthesis 4 allows oxygen to enter 5 allows carbon dioxide to enter 6

4 SGSS/BIOP1/4EPrelim/2024 4 The table below shows the outcome of an investigation on the uptake of bromide ions by a plant. Time from the start of experiment / min Amount of bromide ions taken up by plant tissue under the following conditions / arbitrary units Sugar absent, oxygen present Sugar present, oxygen absent Sugar and oxygen present 0 0 0 0 30 0 30 100