2024 EJC Prelim H2 Biology P1 (Q)

©EJC 2024 9744/01/J2H2PRELIM/2024 [Turn over EUNOIA JUNIOR COLLEGE JC2 Preliminary Examination 2024 General Certificate of Education Advanced Level Higher 2 H2 Biology Paper 1 Multiple Choice 9744/01 19 September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use paper clips, glue or correction fluid/tape. Write your name, civics group and registration 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 18 printed pages and 2 blank pages.

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3 ©EJC 2024 9744/01/J2H2PRELIM/2024 [Turn over Answer all questions. 1 Which statement describes how the molecular structure of starch is suited to its function? A Amylose has a branched structure and amylopectin is coiled to give a compact molecule for transport. B In the breakdown of amylose and amylopectin, many condensation reactions release stored energy. C In the formation of amylose and amylopectin, many hydrolysis reactions allow t he release of stored energy. D Amylose and amylopectin form a complex that is insoluble and so does not affect the water potential of the cell. 2 The structure of phospholipids includes: 1 polar phosphate heads 2 hydrophobic fatty acid chains 3 saturated fatty acid chains. What are essential for the formation of a phospholipid bilayer in a cell surface membrane? A 1 and 2 B 1 and 3 C 2 and 3 D 3 only 3 The diagram shows the structure of an amino acid. What is true about this amino acid? 1 It has a hydrophobic R group. 2 It is amphoteric. 3 It is insoluble in water. A 1 only B 3 only C 1 and 2 only D 1, 2 and 3

4 ©EJC 2024 9744/01/J2H2PRELIM/2024 4 What determines the specificity of an enzyme? 1 the covalent and other bonding between R groups of the polypeptide 2 the optimum pH of the enzyme 3 the covalent peptide bonds between amino acids of the polypeptide 4 the shape of the substrate molecule A 1, 2, 3 and 4 B 1 and 3 only C 1 only D 2, 3 and 4 only 5 Which row shows features that occur in plant cells and bacterial cells? key ✓ = found in plant cells and bacterial cells ✗ = not found in at least one of these two types of cell 70S ribosomes 80S ribosomes centrioles circular DNA A ✓ ✗ ✓ ✗ B ✓ ✗ ✗ ✓ C ✗ ✓ ✓ ✗ D ✗ ✓ ✗ ✓ 6 A student used a light microscope to observe a blo