2020-Sec-4-Pure-Biology-SA2-Geylang-Methodist QP

______________________________________________________________________ BIOLOGY Paper 1 6093/01 4 Express Additional materials: Optical Answer Sheet 1 hour Setter : Ms Ng Sio Ying 15 Sep 2020 READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, papers clips, highlighters, glue or correcti on fluid on the Optical Answer Sheet. Write your name, class and index number on the Optical Answer Sheet provided. There are forty questions in this paper. Answer all the 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 separate answer sheet. Read the instructions on the answer sheet very carefully. Each correct answer will score one mark. No mark will be deducted for a wrong answer. Any rough working should be done in this paper. This document consists of 20 printed pages. [Turn over Geylang Methodist School (Secondary) Preliminary Examination 2020

2 GMS(S)/BiologyP1/Prelim/2020/4E 1 When a red stain is added to a culture containing both living and dead cells, only the dead cells take up the stain. Which structure prevents the stain from entering the living cells? A cell membrane B cell wall C lysosomes D nucleus 2 The diagram shows a section through an eye. Which of the following best describes structures X and Y? A organs in an organ system B organs in a tissue C organ systems in an organ D tissues in an organ

3 GMS(S)/BiologyP1/Prelim/2020/4E 3 The diagram shows Paramecium¸ a single-cell freshwater organism. Paramecium has two contractile vacuoles for the evacuation of excess water from its body. The table below records the average time taken by a contractile vacuole to fill up and expel excess water out of the cell by contracting, when the organism is immersed into the three different liquids, X, Y and Z. liquid that organism is immersed in average time taken / s X 189 Y 28 Z 63 Which row shows the correct identities of liquids X, Y and Z? X Y Z A 0.3% salt solution 0.1% salt solution water B 0.1% salt solution water 0.3% salt solution C water 0.3% salt solution 0.1% salt solution D 0.3% salt solution water 0.1% salt solution 4 What property of water makes it suitable as a component of blood plasma? A Water has a high latent heat of vaporisation. B Water is a good solvent. C Water is incompressible. D Water is the raw material for chemical reactions.

4 GMS(S)/BiologyP1/Prelim/2020/4E 5 The diagrams show four identical plant cells. The dots show the concentration of a chemical. The arrows repre sent the direction of movement of the chemical. Which diagram or diagrams show a cell where active transport is taking place? A 1 and 2 B 2 and 3 C 2 and 4 D 3 only 6 A student conducted a series of f