VJC 2021 H2 Bio 9744 P1 QP

VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION 2021 HIGHER 2 NAME : ……………………………………………………….………………. CT CLASS: ………………..……… BIOLOGY Paper 1 Multiple Choice 9744 / 01 24/09/2021 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your name and class on the Answer Sheet in the spaces provided. WRITE and SHADE your EXAM NUMBER on the Answer Sheet in the spaces provided. There are thirty questions on this 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 separate Answer Sheet. Read the instructions on the 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. This document consists of 24 printed pages. [Turn over]

1 1 The electron micrograph shows three cell organelles X, Y and Z. Which of the following statements about organelles X, Y and Z is/are true? 1 If a metabolic poison is introduced into the cell, only the function of organelles Y and Z will be disrupted. 2 Organelles Y and Z have more than one type of RNA associated with them. 3 In the absence of organelle X, the fluidity of the membrane will not be regulated. A 1, 2 and 3 B 1 and 3 only C 2 and 3 only D 2 only

2 2 The table compares the structure and function of some biomolecules. Structure Function Polymer Storage Structural Starch 1 2 3 Cellulose 4 5 6 Triglyceride 7 8 9 Phospholipid 10 11 12 Which combination of numbers links the four biomolecules to their correct structures and functions? A 1, 2, 4, 6, 8 and 12 B 1, 3, 5, 8, 10 and 11 C 2, 4, 6, 7, 8 and 11 D 3, 4, 6, 8, 10 and 12 3 Which roles of the cell surface membrane result from the properties of the phospholipids?

3 4 Adult human haemoglobin typically consists of two α chains and two β chains. Approximately 5% of humans have one amino acid in the β chain that has been changed. This change affects the structure and stability of haemoglobin. Which levels of protein structure could be affected in the haemoglobin with the changed amino acid? A primary only B primary, secondary and tertiary only C secondary, tertiary and quaternary only D primary, secondary, tertiary and quaternary 5 The decomposition of hydrogen peroxide to water and oxygen is catalysed by the enzyme catalase. During an investigation, 2 cm 3 of catalase was added to 20 cm3 of hydrogen peroxide and the volume of oxygen released was collected at intervals over a period of time. Which bar chart shows the result of this investigation?

4 6 Under normal metabolism, alcohol is broken down in the liver b