Sec 4 Science Biology SA2 2018 North Vista QP

NORTH VISTA SECONDARY SCHOOL PRELIMINARY EXAMINATION 2018 40 SUBJECT: SCIENCE(CHEMISTRY/BIOLOGY)( PAPER 1) DATE: 12 SEPTEMBER 2018 LEVEL / STREAM: SECONDARY 4 EXPRESS CODE : 5078/01 TIME: 1 HOUR INSTRUCTIONS TO CANDIDATES NAME: ________________________________( ) CLASS: _________ Write in soft pencil. Do not use staples, paper clips, glue or correction tape/fluid. Write your full name, register number and class on the cover page of the question paper and OTAS sheet provided. There are forty 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 OTAS sheet. Read the instructions on the OTAS 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 question paper. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. A copy of the Data Sheet is printed on page 19. A copy of the Periodic Table is printed on page 20. This question paper consists of 20 printed pages. [Turn over www.KiasuExamPaper.com 234

10 21 The diagram shows cells in the epidermis of a leaf. Which structural features should also be added to cells in X and Y to complete the diagram? cell X cell Y chloroplasts nucleus chloroplasts nucleus A 998 8 key B 9899 9 = yes C 8998 8 = no D 8889 22 The diagram shows a section through a root. What are the levels of organisation of the labelled structures? cell organ tissue A PQ R B PR Q C Q R P D R Q P Y X Q P R www.KiasuExamPaper.com 235

11 23 The diagram represents an experiment where two solutions, P and Q, are separated by a partially permeable membrane. What is the initial movement of the three different molecules b etween the two solutions, P and Q? net movement from Q to P net movement from P to Q no net movement A B C D 24 The table shows the results of some food tests. Which row shows a food containing both protein and starch? Benedict’s solution biuret test ethanol iodine solution A blue blue clear blue-black B blue purple clear blue-black C red blue cloudy brown D red purple cloudy brown partially permeable membrane solution P solution Q www.KiasuExamPaper.com 236

12 25 According to the lock and key hypothesis, what represents the lo c k a n d k e y f o r t h e e n z y m e lipase? lock key A glycerol lipase B lipase lipids C lipids fatty acids D lipids lipase 26 The diagram shows part of the alimentary canal and associated organs. Which part would contain high concentrations of glucose and ami no acids, four hours after eating a meal? A B C D www.KiasuExamPaper.com 237

13 27 Two test-tubes, P and Q, were set up, each containing a solutio n of red hydrogencarbonate indicator. Hydrogencarbonate indicator turns yellow when the carbon dioxide concentration increases and turns purple when the carbon dioxide concentration decreases. Similar pieces of the same aquatic plant were placed into tubes P and Q. Tube P was uncovered and tube Q had a black light-proof cover. The tubes were left in a warm room in sunlight for four hours. What would be the colour of the hydrogencarbonate indicator in the two tubes after four hours? tube P tube Q A purple red B purple yellow C red yellow D yellow red 28 The photomicrograph is a section through a plant organ. Which label identifies the xylem vessels? A B C D green aquatic plant black light- proof cover tube P tube Q www.KiasuExamPaper.com 238

14 29 The graph shows pressure changes on the left side of the heart during a cardiac cycle. Which row correctly identifies W, X, Y and Z? W X Y Z A atrioventricular valves close semi-lunar valves close semi-lunar valves open atrioventricular valves open B atrioventricular valves close semi-lunar valves open semi-lunar valves close atrioventricular valves open C semi-lunar valves close atrioventricular valves open atrioventricular valves close semi-lunar valves open D semi-lunar valves open atrioventricular valves close atrioventricular valves open semi-lunar valves close ventricular pressure aortic pressure atrial pressure www.KiasuExamPaper.com 239

15 30 The diagram shows a section through the mammalian heart. Which labelled structures carry oxygenated blood? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4 31 What is the minimum number of cell membranes a molecule of oxyg en passes through during gaseous exchange between the alveoli and the blood plasma in the capillaries? A 2 B 3 C 4 D 5 32 When the nervous system responds to a stimulus, there are several stages to the response. 1 The central nervous system processes the information. 2 The receptors detect the stimulus. 3 A nerve impulse is sent to the central nervous system. 4 A response is produced. 5 A nerve impulse is sent to the muscles. What is the correct order of the stages? A 2, 3, 1, 5, 4 B 2, 3, 5, 1, 4 C 3, 2, 1, 5, 4 D 3, 2, 5, 1, 4 1 2 3 4 www.KiasuExamPaper.com 240

16 33 A person looks at some hills far away. Which row shows the state of the lenses, ciliary muscles and suspensory ligaments in her eyes? lenses ciliary muscles suspensory ligaments A thick contracted slacken B thick relaxed taut C thin contracted slacken D thin relaxed taut 34 A hydra was kept in an aquarium and its growth was observed. The diagram shows the hydra growing and releasing an offspring from the side of its body. Which row describes the reproduction of hydra? parent and offspring are genetically identical uses sexual reproduction A 99 B 98 C 89 D 88 35 Which plants are most likely to adapt successfully to a climate change in their environment? A plants that are cross-pollinated B plants that do not rely on wind-pollination C plants that grow rapidly D plants that reproduce asexually www.KiasuExamPaper.com 241

17 36 What does a gene control production of? A a chromosome B an allele C protein D DNA 37 The family tree shows the inheritance of the ability to smell f lowers called freesias. The allele for the ability to smell freesias is dominant. Which individual’s symbol is not correct? 38 An organism is homozygous dominant for a gene which has two possible alleles, T and t. Which diagram represents a gamete from this organism? www.KiasuExamPaper.com 242

18 39 The diagram shows part of the carbon cycle. In which labelled stage(s) is respiration occurring? 1 2 3 4 A 9998 B 9899 C 8999 D 8889 40 The table shows the ability of three species of fish and their eggs to survive in water at different pH levels. fish species pH 4.0 4.5 5.0 5.5 6.0 6.5 trout 899999 key sea bass 8889 9 9 9 = survive perch 8 89999 8 = do not survive fish eggs 8889 9 9 A lake at pH 6.0 contains breeding populations of all three fish. If acid rain causes the pH to fall to 5.0, which outcome would likely occur? A Trout and perch will survive and produce offspring. B Trout and perch will survive but only perch will produce offspring. C Trout and perch will survive but produce no offspring. D Trout, sea bass and perch will survive but produce no offspring. www.KiasuExamPaper.com 243