2024 Sec 4IP Bio EOY Paper 2 - Final

Name: _________________________ ( ) Class: _____________ YEAR FOUR INTEGRATED PROGRAMME END-OF-YEAR EXAMINATION BIOLOGY Paper 2 2 October 2024 1 hour 45 minutes Candidates answer on the Question Paper. No Additional Materials are required. ________________________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write your name, register number, and class on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use paper clips, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided on the Question Paper. Section B Answer only ONE question. Write your answers in the spaces provided on the Question Paper. Electronic calculators may be used. You are reminded of the need for clear presentation in your answers. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 21 printed pages and 1 blank page. [Turn over For Examiner’s Use Section A (70) Section B (10) 10 Either 10 Or Total (80)

2 Section A Answer all questions. Write your answer in the spaces provided. 1 Fig. 1 shows a unicellular organism. Fig. 1 (a) State whether the organism in Fig. 1 should be classified as an animal, plant, bacteria, or virus. Give two reasons to support your answer. …….…………………………………………………………………………………………… …….…………………………………………………………………………………………… …….…………………………………………………………………………………………… …….…………………………………………………………………………………………… …….……………………………………………………………………………………….. [3]

3 (b) Suggest how the flagella of the organism in Fig. 1 would help it to survive. …….…………………………………………………………………………………………… …….……………………………………………………………………………………… [1] (c) An experiment was conducted where some of the organisms in Fig. 1 were placed in a test tube of concentrated sugar solution and observed over a period of time. State and explain the changes you would observe in the size of the cells. …….…………………………………………………………………………………………… …….…………………………………………………………………………………………… …….…………………………………………………………………………………………… …….…………………………………………………………………………………………… …….…………………………………………………………………………………………… …….……………………………………………………………………………………….. [3] [Total: 7 marks]

4 2 A student investigates the action of an enzyme from the human alimentary canal on starch. The setup for the investigation is shown in Fig. 2. Fig. 2 (a) Identify the enzyme and the sugar present in the solution after 30 minutes. Enzyme: ……………………………………………… Sugar: …………………………… [2] (b) De