2018 RVHS H2 Biology Prelims Paper 1 Questions

1 River Valley High School Year 6 H2 Biology 9744 Paper 1 2018 Preliminary Examination RIVER VALLEY HIGH SCHOOL YEAR 6 PRELIMINARY EXAMINATION CANDIDATE NAME CENTRE NUMBER S CLASS INDEX NUMBER H2 BIOLOGY 9744/01 Paper 1 Multiple Choice 19 Sep 2018 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Centre number, index number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE IN ANY BARCODES. 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 Question Paper consists of 23 printed pages and 1 blank page.

2 River Valley High School Year 6 H2 Biology 9744 Paper 1 2018 Preliminary Examination 1 The diagram shows a typical unicellular prokaryote. Which row correctly describes the labelled structures? 1 2 3 A chromatin cell surface membrane pilus B chromosome cell wall flagellum C chromosome cell wall pilus D plasmid cell surface membrane flagellum 2 Which of the following correctly describes the process of exocytosis? 1 The secretory vesicle diffuses from the trans face of the Golgi apparatus towards the cell surface membrane. 2 Secretory vesicles tend to contain small molecules that cannot pass through the hydrophobic core of the membrane. 3 The membrane of the secretory vesicle fuses with the cell surface membrane, releasing the molecules into the extracellular fluid. A 3 only B 1 and 3 only C 1 and 2 only D All of the above

3 River Valley High School Year 6 H2 Biology 9744 Paper 1 2018 Preliminary Examination 3 The structure of phosphatidylcholine, a common membrane phospholipid, is shown. Which combination correctly describes the synthesis, structure and property of one molecule of phosphatidylcholine? number of water molecules eliminated during synthesis number of ester bonds property A 3 3 amphipathic B 2 2 amphipathic C 2 2 amphoteric D 3 3 amphoteric 4 The following statements describe the four levels of organisation of the structure of haemoglobin. How many of the following statement(s) is true? 1 In primary structure, α and β subunits consist of any number of amino acids joined in a specific sequence by peptide bonds. 2 In secondary structure, the α-helices in each subunit ar