Sec 4 Science Biology SA2 2018 CHIJ St Joseph QP

8 5078/01/Prelim2018 [Turn Over 21 The diagram shows four cells. 1 2 3 4 Which cells are involved in transport? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4 22 Some red blood cells were placed i n distilled water and others were placed in three salt solutions of different concentrations. Which diagram shows the appearance of a cell after being placed in a solution of higher water potential for a short time? AB C D 2018 Sec 4 Science Biology SA2 - CHIJ St Joseph www.KiasuExamPaper.com 79

9 5078/01/Prelim2018 [Turn Over 23 The diagram shows an experiment on diffusion. More sugar diffuses out of the bag than diffuses in. What is the concentration of sugar in solution X? A 10% B 20% C 30% D 40% www.KiasuExamPaper.com 80

10 5078/01/Prelim2018 [Turn Over 24 An enzyme is completely denatured at 50°C. A fixed concentratio n of this enzyme is added to a fixed concentration of its substrate. The t ime taken for completion of the reaction is measured at different temperatures. Which graph shows the results? A B C D www.KiasuExamPaper.com 81

11 5078/01/Prelim2018 [Turn Over 25 The graphs show the quantities of selected vitamins and minerals in four foods. Which food is the richest source of the vitamin or mineral essential for the transport of oxygen by the blood? A beans B e ggs C fish D fruit 26 A student set up a test-tube containing starch, water and salivary amylase. How could the student test whether the amylase had catalysed th e digestion of all the starch? A Add Biuret solution. B Add dilute hydrochloric acid. C Add iodine solution. D Weigh the test-tubes and contents before and after the experiment. 27 A person has his gall bladder removed. Which statement is correct? A He cannot eat carbohydrates. B He can eat fat only in small amounts. C He can eat only liquid food. D He must not eat more than one large meal a day. www.KiasuExamPaper.com 82

12 5078/01/Prelim2018 [Turn Over 28 The bar chart shows the average number of chloroplasts in each of three different types of leaf cell. What are the three types of cell? 123 A guard cell palisade mesophyll cell spongy mesophyll cell B palisade mesophyll cell spongy mesophyll cell guard cell C spongy mesophyll cell guard cell palisade mesophyll cell D spongy mesophyll cell palisade mesophyll cell guard cell www.KiasuExamPaper.com 83

13 5078/01/Prelim2018 [Turn Over 29 A plant is kept in the dark for two days. One of its leaves is used in an experiment to investigate photosynthesis as shown in the diagram. What are the colours of Q and R, when the leaf is tested for starch using iodine solution? QR A blueblack brown B brown blueblack C blueblack blueblack D brown brown www.KiasuExamPaper.com 84

14 5078/01/Prelim2018 [Turn Over Use the diagram below, which shows a section through a leaf, to answer questions 30 and 31. 30 What takes place in the structures indicated? transport of mineral ions to the cells of the leaf transport of amino acids away from the cells of the leaf allow the entry and exit of gases from the leaf A 43 5 B 34 1 C 34 5 D 42 1 31 The leaf is losing water to the atmosphere. What processes are occurring at X and Y? XY A diffusion evaporation B evaporation diffusion C osmosis transpiration D transpiration osmosis www.KiasuExamPaper.com 85

15 5078/01/Prelim2018 [Turn Over 32 The diagram shows a plan of part of the human circulatory system. In which vessel are the breakdown products of alcohol first found? 33 The diagram shows a double circulatory system. Which two vessels carry blood at the highest pressure? A 1 and 2 B 1 and 4 C 2 and 3 D 2 and 4 www.KiasuExamPaper.com 86

16 5078/01/Prelim2018 [Turn Over 34 The table shows some of the features of respiration. Which row is correct for anaerobic respiration in humans? energy remaining in products amount of energy released releases carbon dioxide A high low no B highh igh alwa ys C low low no D low high alwa ys 35 The diagram shows the eye of a person in a brightly-lit room. What happens to distance F and distance G when this person moves into a dimly-lit room? FG A increases decreases B increases increases C decreases increases D decreases decreases www.KiasuExamPaper.com 87

17 5078/01/Prelim2018 [Turn Over 36 The diagram shows a flower in vertical section. Which numbered parts of the flower continue to develop after fertilisation? A 1 and 5 B 2 and 4 C 3 and 5 D 4 and 5 37 The diagram shows a potato tuber that developed from the stem o f a parent potato plant. Three shoots are starting to grow from the tuber. How do the genotypes of the shoots compare with the genotypes of the tuber and of the parent? A The y are all different. B They are all identical. C The shoots are identical to each other, but are different from the tuber and the parent. D The shoots are identical to the tuber, but are different from the parent. www.KiasuExamPaper.com 88