RVHS 2023 JC2 H2 Prelim P1 A

1 River Valley High School H2 Biology 9744/01 2023 JC2 Preliminary Examination RIVER VALLEY HIGH SCHOOL JC2 PRELIMINARY EXAMINATION CANDIDATE NAME CENTRE NUMBER S CLASS 22J INDEX NUMBER H2 BIOLOGY 9744/01 Paper 1 Multiple Choice 22 September 2023 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 and 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 22 printed pages and 2 blank pages.

2 River Valley High School H2 Biology 9744/01 2023 JC2 Preliminary Examination 1 Which organelle(s) are required in the formation of glycoprotein 120 in the HIV viral envelope? 2 The diagram below shows a lipid molecule E, and a triglyceride. molecule E triglyceride Which row correctly identifies a feature that is present in molecule E and a triglyceride? molecule E triglyceride A one unsaturated fatty acid one saturated fatty acid B no ester bonds three ester bonds C one fatty acid three fatty acids D zero double bonds four double bonds

3 River Valley High School H2 Biology 9744/01 2023 JC2 Preliminary Examination 3 An experiment was conducted to determine the mode of entry of a water-soluble drug into animal cells. The animal cells were placed into separate containers with different concentrations of the drug. The initial rate of entry of the drug into the cells were measured. The experiment was conducted at two different temperatures, 20 oC and 30 oC. The results are shown in the graph below. Which statement(s) are correct? 1 ATP is not required for the entry of the drug. 2 A change in pH will decrease the rate of drug entry. 3 An increase in membrane fluidity will increase the concentration of the drug inside the cell. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only rate of entry of drug concentration of drug outside cell 20 oC 30 oC

4 River Valley High School H2 Biology 9744/01 2023 JC2 Preliminary Examination 4 Bread contains a protein known as gluten. Some features of the structur