DHS 2023 H2 Prelim Paper 1

© DHS 2023 9744/01 [Turn over Name: Centre/Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination Year 6 H2 BIOLOGY 9744/01 Paper 1 Multiple Choice Questions 25 September 2023 Additional Materials: Multiple Choice Answer Sheet 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your centre number, index number, name and class at the top of this page. 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 25 printed pages 1 blank page.

2 © DHS 2023 9744/01 1 Four students, A – D, were asked to match the function with the appearance of some cell structures in an animal cell. The functions were listed by a number. 1 mRNA passes through to the ribosome 2 organises microtubules to produce the spindle during cell division 3 packaging of hydrolytic enzymes that will remain in the cell The appearances were listed by a letter. V membranes which surround an enclosed inner cavity W non-membrane bound, spherical structures X a double membrane interspersed with pores Y non-membrane bound, cylindrical structures Z membrane-bound sacs, arranged as a flattened stack Which student correctly matched the numbered function with the appearance of the cell structure? 1 2 3 A V W Y B V Y Z C X W Y D X Y Z

3 © DHS 2023 9744/01 [Turn over 2 The electron micrograph shows a chloroplast. Which row correctly shows the function or characteristic of the labelled structure? help to maintain high H+ concentration made up of phospholipid where ATP is synthesised A 1 and 2 3 and 4 2 B 2 and 3 2 and 4 3 and 4 C 1 and 2 1, 2 and 3 3 and 4 D 3 and 4 1, 3 and 4 2 2 3 4 1

4 © DHS 2023 9744/01 3 Which row describes starch, glycogen, and cellulose? Starch Glycogen Cellulose A Highly branched amylose due to α-1,6 glycosidic bonds Highly compacted molecule that serves as a good energy storage in animal cells Provides structural support and prevents cells from bursting when turgid B Insoluble due to the – OH groups projecting into the interior of helices Made up of α-glucose monomers with 1,4 glycosidic bonds resulting in highly branched chains Cellulose chains are organised into microfibrils and macrofi