2021 EJC Promo JC1 P1 Bio (Q)

©EJC 2021 9744/01/J1H2PROMO/2021 [Turn over EUNOIA JUNIOR COLLEGE JC1 Promotional Examinations 2021 General Certificate of Education Advanced Level Higher 2 H2 Biology Paper 1 Multiple Choice 9744/01 05 October 2021 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use paper clips, glue or correction tape/fluid. Write your name, civics group and registration number on the Answer Sheet in the spaces provided. There are thirty Multiple Choice Questions in 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.

2 ©EJC 2021 9744/01/J1H2PROMO/2021 1 Raffinose is a trisaccharide which can be degraded by enzymes. The results of two different enzymatic incubations are shown here: enzyme used products sucrase melibiose and fructose galactosidase galactose and sucrose Which statements are consistent with the results shown above? 1 Raffinose is composed of two different monosaccharides. 2 Melibiose is a dissaccharide. 3 Acid hydrolysis of raffinose would yield glucose. 4 The products of raffinose digestion by sucrase and galactosidase will each yield an orange- red precipitate when heated with Benedict's reagent. A 1 and 3 only B 2 and 4 only C 2, 3 and 4 only D 1, 2, 3 and 4 2 In triglyceride molecules, where are carbon-carbon double bonds located? A between fatty acids and glycerol B within fatty acids and within glycerol C within fatty acids only D within glycerol only

3 ©EJC 2021 9744/01/J1H2PROMO/2021 [Turn over 3 Which correctly matches the functional and structural features of cellulose, collagen, glycogen and triglyceride? key: ✓= true ✗= false function structure fibrous molecule held together by hydrogen bonds branched chains A cellulose triglyceride support energy source   ✓    B collagen cellulose strengthening support       C collagen glycogen strengthening storage       D glycogen triglyceride storage energy source       4 Which row about the structure of proteins is correct? primary structure tertiary structure quaternary structure A is the number of amino acids present in a protein is the result of cross bonding between all the amino acids in the primary structure is the polypeptides that link together to form a protein B is the order of amino acids present in a protein encoded by