AES_2019_Bio_Prelim_P2_QP

Name: ....................................................... ( ) This Question Paper consists of 18 printed pages including this page. [Turn over ASSUMPTION ENGLISH SCHOOL PRELIMINARY EXAMINATION 2019 BIOLOGY 6093 / 02 ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL LEVEL: Sec 4 Express DATE: 3 September 2019 CLASS: Sec 4/2 DURATION: 1 hour 45 minutes Additional Materials provided: NIL INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your NAME and INDEX NUMBER at the top of this page. SECTION A (50 marks) STRUCTURED QUESTIONS Answer all questions in the spaces provided. SECTION B (30 marks) FREE RESPONSE QUESTIONS Answer three questions in this section in the spaces provided. Question 3 is in the form of an Either / Or question. Only one of the alternatives should be answered. For Examiner’s Use Paper 1 /40 Paper 2 Section A /50 Paper 2 Section B /30 Paper 3 /40 Total /160 Overall /100 www.KiasuExamPaper.com 20

2 6093/02/4E/PRELIMS/19 SECTION A – STRUCTURED QUESTIONS (50 marks) Answer ALL the questions in the spaces provided. 1 The figure below shows some chemical molecules found in the human body and how they are joined to form larger molecules. (a) Identify molecules P, Q, R and S. P: …………………………………… Q: …………………………………… R: …………………………………… S: …………………………………… [2] (b) (i) State a test that a student can use to test for the presence of S in a liquid sample of food. ……………………………………………………………………………… [1] (ii) Describe how this test is carried out and the observations that can confirm the presence of S in the food. ……………………………………………………………………………… ……………………………………………………………………………… ……………………………………………………………………………… ……………………………………………………………………………… ……………………………………………………………………………… ……………………………………………………………………………… …………………………………………………………………………….... [2] Q R S P www.KiasuExamPaper.com 21

3 6093/02/4E/PRELIMS/19 [Turn Over 2 The figure shows a potted plant with an outer ring of bark removed at point X. Leaf K is enclosed within a bottle containing carbon dioxide with radi oactive carbon. The soil was watered with a solution containing radioac tive phosphate ions. The entire plant was exposed to sunlight for 6 hours. (a) Which tissue of the vascular bundle is removed at point X? ...................................................................................................................... [1] (b) Which labelled part(s) J, K, L and / or M will be tested positive fo