2024 NJC H2 Bio P1 MS

©NJC 2024 9744/01/SH2 Preliminary Examination [Turn over H NATIONAL JUNIOR COLLEGE, SINGAPORE Senior High 2 Preliminary Examination Higher 2 CANDIDA TE NAME BIOLOGY CLASS 2bi2_____ REGISTRATION NUMBER Biology Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9744/01 18 September 2024 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Biology class and registration number on all the work you hand in. 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. Your five-digit OAS index number is made up of the second and last four digits of your registration number. For example: Registration no. OAS Index no.

2 ©NJC 2024 9744/01/SH2 Preliminary Examination 2205123 25123 This document consists of 20 printed pages.

3 ©NJC 2024 9744/01/SH2 Preliminary Examination [Turn over 1 The endosymbiotic theory states that eukaryotic mitochondria and chloroplasts originated from ancestral prokaryotes. Which statements support this theory? 1 The smallest eukaryotic cells are the same size as many bacteria. 2 Eukaryotic cells and prokaryotic cells both have ribosomes free in the cytoplasm. 3 Human mitochondrial DNA is circular and contains no introns. 4 Chloroplasts divide by binary fission, independently of the plant cell. A 1, 2 and 3 only B 1 and 3 only C 1 and 4 only D 3 and 4 only Ans: D 2 The diagram shows the structure of a bacterium. Which row correctly identifies the labelled structures? P Q R S A 70S ribosomes plasma membrane cellulose cell wall single-stranded DNA B 80S ribosomes plasma membrane cellulose cell wall double-stranded DNA C 70S ribosomes plasma membrane peptidoglycan cell wall double-stranded DNA D 80S ribosomes tonoplast peptidoglycan cell wall double-stranded DNA Q P S R

4 ©NJC 2024 9744/01/SH2 Preliminary Examination Ans: C 3 Raffinose is a trisaccharide that can be digested by enzymes. The table shows the results of two different enzymatic incubations. enzyme used products galactosidase galactose and sucrose sucrase melibiose and fructose Which statements are consistent with the results shown above? 1 Acid hydrolysis of raffinose would yield glucose. 2 Melibiose is a disaccharide. 3 Raffinose is composed of three different monosaccharides. 4 The products of digestion by galactosidase and sucrase will yield a brick red p