BioMedical Admissions Test 4500/12. Thursday 2 November Scientific Knowledge and Applications

Transcription

1 iomedical dmissions Test 4500/2 Thursday 2 November minutes STION 2 INSTRUTIONS TO NITS Scientific Knowledge and pplications Please read this page carefully, but do not open the question paper until you are told that you may do so. This paper is Section 2 of 3. Your supervisor will collect this question paper and answer sheet before giving out Section 3. separate answer sheet is provided for this section. Please check you have one. You also require a soft pencil and an eraser. Please complete the answer sheet with your: MT candidate number entre number ate of birth Name Speed as well as accuracy is important in this section. Work quickly, or you may not finish the paper. There are no penalties for incorrect responses, only marks for correct answers, so you should attempt all 27 questions. ach question is worth one mark. nswer on the sheet provided. Questions ask you to show your choice between options by shading one circle. If you make a mistake, erase thoroughly and try again. You must complete the answer sheet within the time limit. You can use the question paper for rough working or notes, but no etra paper is allowed. alculators are NOT permitted. Please wait to be told you may begin before turning this page. This paper consists of 23 printed pages and 5 blank pages. PV3 ULS 207

2 2 LNK PG ULS 207

3 The diagram shows a section through part of a healthy human. 3 P Q R Which row in the table shows the correct secretions from P, Q and R? secretion(s) from P secretions from Q secretion(s) from R bile protease, high hydrogen ion concentration bile, high hydrogen ion concentration protease, low hydrogen ion concentration insulin, protease, lipase protease, high hydrogen ion concentration protease, lipase, amylase insulin, protease, lipase, amylase protease, lipase, amylase protease, low hydrogen ion concentration protease, high hydrogen ion concentration protease, low hydrogen ion concentration insulin, protease, lipase, amylase protease, lipase, amylase bile bile, high hydrogen ion concentration bile insulin ULS 207 [Turn over

4 2 The diagram shows an electrolysis eperiment. 4 + power supply ammeter beaker + cathode (copper) anode (copper) copper(ii) sulfate solution Which reaction occurs at the anode and which reaction occurs at the cathode for this eperiment? anode cathode SO 2 4 SO 2 + O 2 + 2e u e u u e u SO 2 4 SO 2 + O 2 + 2e 2H + + 2e H 2 u u e 2 u e u u u e u u e u e u ULS 207

5 3 elow are four statements about electromagnetic waves. 5 Microwaves have a smaller wavelength than visible light. 2 The speed of visible light in a vacuum is higher than the speed of other types of electromagnetic wave. 3 Gamma rays have the largest wavelength of any electromagnetic wave. 4 Radio waves are used in hospital radiography to look for broken bones. Which of the statements are correct? G none of them and 2 only and 3 only and 4 only 2 and 3 only 2 and 4 only 3 and 4 only H, 2, 3 and 4 4 Which one of the following is equivalent to ( 5 2) 2? G H ULS 207 [Turn over

6 6 5 SI is an inherited condition in humans. People with some types of SI are unable to make a functional enzyme necessary for the production of healthy white blood cells. scientist studying these types of SI compared features of the N and the structure of the enzyme in people who have this condition and people without SI. Which of the following features may have been different? the allele of the gene coding for the enzyme 2 the order of amino acids in the enzyme 3 the order of bases in the gene coding for the enzyme 4 the shape of the active site of the enzyme only 4 only and 3 only 2 and 3 only 2 and 4 only, 2 and 4 only G, 2, 3 and 4 ULS 207

7 6 Which of the following atoms and ions contain(s) 20 neutrons and 8 electrons? S 2 37 l r K a G H 3 only and 2 only and 3 only 2 and 4 only 2 and 5 only 4 and 5 only 2, 4 and 5 only, 2, 3 and 4 only ULS 207 [Turn over

8 7 puddle is left on a road after a rain shower. The water in the puddle slowly disappears by evaporation. 8 Three statements about the effect of changing different conditions on this process are given below. The rate of evaporation is greater at higher temperatures. 2 The rate of evaporation is greater when the air above the puddle is still. 3 The rate of evaporation is greater when the puddle has a larger surface area. Which of the statements is/are correct? (ssume for each statement that all other conditions remain the same.) G none of them only 2 only 3 only and 2 only and 3 only 2 and 3 only H, 2 and 3 ULS 207

9 9 8 In a group of 20 patients at a medical centre, 5 suffered from migraines. Two patients from the group of 20 were picked at random for a survey on the use of painkillers. What is the probability that both of the patients picked suffered from migraines? ULS 207 [Turn over

10 0 9 The diagram shows four eperiments used to investigate movement of substances across dialysis tubing. This tubing is a partially permeable membrane which allows both glucose and water to pass through it. eperiment eperiment 2 eperiment 3 eperiment 4 distilled water dialysis tubing 0% glucose solution 0% glucose solution distilled water Which row in the table shows the eperiment(s) where there will be movement of glucose through the partially permeable membrane and the eperiment(s) where there will be movement of water through the partially permeable membrane? eperiment(s) with movement of glucose through partially permeable membrane eperiment(s) with movement of water through partially permeable membrane 4 only 3 only 3 only 4 only 2 and 4 only and 3 only 2, 3 and 4 only, 3 and 4 only 2, 3 and 4 only, 2, 3 and 4 ULS 207

11 0 piece of magnesium ribbon is dropped into a beaker of dilute aqueous hydrochloric acid at room temperature. fter a while the production of bubbles of gas slows down. Which of the following statements can correctly eplain this observation? The particles have less energy. 2 The concentration of hydrochloric acid decreases. 3 The activation energy for the reaction increases. G none of them only 2 only 3 only and 2 only and 3 only 2 and 3 only H, 2 and 3 ULS 207 [Turn over

12 2 Two resistors R and R 2 are connected in series with a cell. Resistor R has twice the resistance of resistor R 2. R R 2 Si statements about this circuit are given below. The voltage across each resistor is the same. 2 The voltage across R is twice that across R 2. 3 The voltage across R 2 is twice that across R. 4 The current is the same in both resistors. 5 The current in R is twice the current in R 2. 6 The current in R 2 is twice the current in R. Which pair of statements is correct? G H and 4 only and 6 only 2 and 4 only 2 and 5 only 2 and 6 only 3 and 4 only 3 and 5 only 3 and 6 only ULS 207

13 3 2 In triangle PRS, line QT is parallel to side RS. RS =.5 cm TS =.8 cm QT = 0.3 cm [diagram not to scale] R Q.5 cm 0.3 cm P T S.8 cm What is the length of PS? 0.25 cm 0.36 cm 0.45 cm 2.05 cm 2.6 cm 2.25 cm ULS 207 [Turn over

14 3 olly the sheep was born in 996. She was unusual because she had no biological father. Sheep have a diploid number of 54 chromosomes in their body cells. 4 The diagram shows the process of how she was produced.. mammary gland (udder) cell donor 2. egg cell (gamete) donor cultured mammary gland cells nucleus from mammary gland cell 3. cells fused 4. grown in culture early embryo nucleus removed from gamete 5. implanted in uterus of a third sheep surrogate mother 6. development lamb ( olly ) Which of the following statements about this process is/are correct? The gamete cell nucleus contained 27 chromosomes. 2 The cells produced in step 4 had the same properties as stem cells. 3 None of the cells involved in the process were produced by meiosis. G none of them only 2 only 3 only and 2 only and 3 only 2 and 3 only H, 2 and 3 ULS 207

15 4 isproportionation is the simultaneous oidation and reduction of the same species in a reaction. In which of the following chemical equations does disproportionation occur? e + ul 2 el 2 + u 2 u 2 O u + uo 3 l 2 + H 2 O Hl + HlO 5 4 al 2 + Na 2 SO 4 aso 4 + 2Nal 5 Hg 2 l 2 Hg + Hgl 2 2 only 2 and 3 only 3 and 4 only, 4 and 5 only 2, 3 and 5 only 5 Uranium-238 is a naturally-occurring alpha emitter. It can be used in the manufacture of the isotope plutonium-239, during which it is bombarded by neutrons. The process of converting a nucleus of uranium-238 to a nucleus of plutonium-239 is a three-stage sequence of nuclear reactions. What is this sequence? (tomic numbers: uranium = 92; plutonium = 94) st stage 2nd stage 3rd stage emission of an α particle emission of a β particle absorption of a neutron emission of an α particle absorption of a neutron emission of an α particle emission of a β particle emission of an α particle absorption of a neutron emission of a β particle absorption of a neutron emission of a β particle absorption of a neutron emission of an α particle emission of an α particle absorption of a neutron emission of a β particle emission of a β particle ULS 207 [Turn over

16 6 GM 6 The acceleration due to gravity at the surface of a planet is given by g =, where M and R 2 R are the mass and radius of the planet respectively, and G is the gravitational constant. It is given that g = 0 N / kg G = 7 0 N m 2 / kg 2 R = m What is M, correct to one significant figure? kg kg kg kg kg kg ULS 207

17 7 7 The diagram shows an eternal view of the human heart. part of an artery present on the surface of the heart Which of the following statements about the artery shown on the diagram is/are correct? It is the site of diffusion of glucose and oygen into the muscle cells of the heart. 2 It transports blood at high pressure. 3 It contains muscle cells. G none of them only 2 only 3 only and 2 only and 3 only 2 and 3 only H, 2 and 3 ULS 207 [Turn over

18 8 8 Propanoic acid is a monoprotic acid. Magnesium is a Group 2 metal. Which of the following chemical equations is correct for the reaction between magnesium carbonate and propanoic acid? 2H 3 H 2 OOH + MgO 3 Mg( 3 H 5 O 2 ) 2 + H 2 O 3 H 6 O 2 + MgO 3 Mg 3 H 5 O 2 + O 2 + H 2 O 2 3 H 6 O 2 + MgO 3 Mg( 3 H 5 O 2 ) 2 + O 2 + H 2 O 2H 3 OOH + MgO 3 Mg(H 3 OO) 2 + O 2 + H 2 O 3 H 6 O 2 + 3MgO 3 Mg 3 3 O 2 + 3O 2 + 3H 2 O 9 swimming pool is 0 m wide. loud sound is made in the water 2.0 m from one wall and the reflected sounds are detected with a microphone placed net to the sound source. The reflection from the wall 8.0 m away arrives 0.00 s after the reflection from the wall 2.0 m away. What is the speed of sound in water? 270 m / s 330 m / s 530 m / s 600 m / s 200 m / s ULS 207

19 9 ULS 207 [Turn over 20 press 2 + as a single algebraic fraction. 2 ( ) 2 ( ) 2 ( ) 2 3 ( ) 2 + ( ) G ( )

20 20 2 The family tree shows the inheritance of freckles. 2 Key male with freckles female with freckles male without freckles female without freckles Which row in the table shows the probability that the net child produced by parents and 2, and the probability that the net child produced by parents 5 and 6 will have freckles? probability that the net child produced by parents and 2 will have freckles probability that the net child produced by parents 5 and 6 will have freckles G 0.25 H ULS 207

21 2 22 Hydrated copper(ii) sulfate has the formula uso 4 5H 2 O. 00 cm 3 of a solution contained 0 g of hydrated copper(ii) sulfate. What is the concentration, in mol / dm 3, of this solution? ( r values: H =.0; O = 6; S = 32; u = 64) 0.00 mol / dm mol / dm mol / dm mol / dm mol / dm mol / dm 3 23 book rests on a table, which in turn rests on the floor. The floor eerts a force P on the table. orce P and one other force constitute a Newton s Third Law interaction pair of forces. What is the other force? the force that the book eerts on the table the force that the book eerts on the arth the force that the arth eerts on the book the force that the arth eerts on the table the force that the floor eerts on the arth the force that the table eerts on the floor ULS 207 [Turn over

22 24 The diagram shows a shape made from a quarter circle of radius 6 cm and a right-angled triangle with a hypotenuse of length 9 cm. 22 [diagram not to scale] 6 cm 9 cm Which of the following epressions gives the area, in square centimetres, of the shape? 3 π π π π π π G 36 π ULS 207

23 23 25 The picture shows a Siamese cat. This type of cat has a gene which is sensitive to temperature. When this gene is inactive in the cells, the coat colour is pale. When the gene is active, it produces an enzyme which causes the coat colour to be darker. If this cat had grown up in a warmer environment its ears, front of face, paws and tail would be paler than those shown in the picture below. student wrote the following statements using this information. The enzyme is denatured at the internal body temperature of the cat so the coat colour is pale. 2 The temperature of the ears, front of face, paws and tail was cooler than the body temperature so they are darker. 3 The coat colour in Siamese cats depends on both genes and the environment. Which of these statements is/are correct? G none of them only 2 only 3 only and 2 only and 3 only 2 and 3 only H, 2 and 3 ULS 207 [Turn over

24 26 What is the volume of hydrogen gas formed (measured at room temperature and pressure) when 0.23 g of pure sodium reacts completely with an ecess of water? ( r values: H =.0; Na = 23. ssume that the molar volume of gas at room temperature and pressure is 24 dm 3.) 0.0 dm dm dm dm dm graph of kinetic energy, in joules ( y - ais) against the square of the speed in (m / s) 2 ( - ais) is plotted for an object of mass 2.5 kg travelling along the surface of the arth. The result is a straight line. What is the numerical value of the gradient of this line? N O TST ULS 207

25 25 LNK PG ULS 207

26 26 LNK PG ULS 207

27 27 LNK PG ULS 207

28 28 LNK PG ULS 207