NYJC Prelim 9744 Paper 1 Answer.docx

NANYANG JUNIOR COLLEGE PRELIMINARY EXAMINATIONS Higher 2 CANDIDATE NAME MARK SCHEME CLASS BIOLOGY 9744/01 Paper 1 Multiple Choice 17 September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name and CT on the Answer Sheet in the spaces provided unless this has been done for you. 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. Calculators may be used. This document consists of 20 printed pages.

2 [Turn over 1 Dialysis (Visking) tubing is an artificial partially permeable membrane with pore sizes of approximately 2.5 nm. Glucose molecules have a diameter of about 1.5 nm and can pass through the pores in the membrane. What else can pass through the pores? 1 bacteria 2 haemoglobin 3 ribosomes 4 fructose A 1 and 3 B 2 and 4 C 2 only D 4 only 2 Which statements are correct for chloroplasts and also for mitochondria? 1 They contain 80S ribosomes. 2 They can transcribe their circular DNA. 3 They can translate mRNA. 4 They are enclosed by double membranes. A 1, 2, 3 and 4 B 1 and 2 only C 2, 3 and 4 only D 3 and 4 only 9744 / H2 Biology / 01

3 3 The diagrams show three examples of different bonds. Which bond(s) hold(s) the secondary structure of proteins together? A 1, 2 and 3 B 1 and 3 only C 1 only D 2 and 3 only 4 A student was provided with a solution of carbohydrate. They removed two samples from the solution and performed tests on each sample, as shown. Which statement explains the results? A Condensation reactions occur in sample two to release reducing sugar. B Glycosidic bonds in a polysaccharide have been broken to release reducing sugar. C Sample one shows that sucrose is present in the carbohydrate solution. 9744 / H2 Biology / 01

4 D The change in colour to a yellow solution shows that glucose is present. 5 Influenza virus has an enzyme called neuraminidase which breaks down glycoproteins in the surface membrane of the cel