2024 SAJC Prelim H2 Biology P1 (Q)

Civics Group Index Number Name (use BLOCK LETTERS) ST. ANDREW’S JUNIOR COLLEGE 2024 JC2 PRELIMINARY EXAMINATIONS H2 BIOLOGY 9744/01 Paper 1: Multiple Choice Thursday 12th September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet (OTAS) READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, civics group and index number on the multiple choice answer sheet in the spaces provided. There are 30 questions in 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 multiple choice Optical answer sheet. INFORMATION TO CANDIDATES Each correct answer will score one mark. A mark will not be deducted for wrong answer. Any rough working should be done in this booklet. At the end of the examination, submit both question paper and multiple choice answer sheet. This document consists of 22 printed pages H2

2 SAJC / H2 Biology 9744/1 JC2 Prelim 2024 [Turn over

3 SAJC / H2 Biology 9744/1 JC2 Prelim 2024 1 The electron micrograph shows a structure found in the cytoplasm of an animal cell. Which biological molecule(s) are found in this structure? A Nucleic acids and proteins B Proteins and phospholipids C Nucleic acids only D Proteins only 2 Which diagram(s) shows that a glycosidic bond can be formed? A 1, 2 and 3 B 1 only C 2 and 3 only D 3 only

4 SAJC / H2 Biology 9744/1 JC2 Prelim 2024 3 The diagram shows the structure of a lysozyme molecule. Which statement(s) about lysozyme are correct? 1 The primary structure of lysozyme is made up of 130 amino acids linked by peptid e bonds. 2 Lysozyme has a secondary structure that has repeated patterns stabilised by hydrogen bonds between R groups. 3 Further folding of the polypeptide chain gives an overall specific 3D conform ation due to R groups interactions. 4 Lysozyme is a quaternary globular protein held together by strong disulfide bonds. A 3 only B 1 and 3 C 1 and 4 D 2 and 4

5 SAJC / H2 Biology 9744/1 JC2 Prelim 2024 4 The statements are comparisons of endocytosis and exocytosis.  Both are mechanisms that involve vesicles and the transport of materials across the cell surface membrane.  Both mechanisms occur to allow bulk transport across the cell surface membrane.  Endocytosis involves taking materials into the cell, whereas exocytosis involves the release of materials from the cell.  Some of the cell surface membrane is lost when endocytosis occurs and there is an increase in the cell surface membrane when exocytosis occurs. How many statement(s) is/are correct? A 1 B 2 C 3 D 4 5 Influenza virus has an enzyme called neuraminidase which breaks down glycoproteins in the surface membrane of the cell that the virus