CHS 2016 Bio Prelim P2 QP

Name: Index Number: Class: CATHOLICHIGH SCHOOL Preliminary Examination 3 Secondary 4 A1 BIOLOGY 5158/02 Paper 2 Friday 16 September 2016 1 hour 45 minutes Additional Materials: - READ THESE INSTRUCTIONS FIRST Write your name, index number and class on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE ON THE MARGINS. Section A Answer all questions. Write your answers in the spaces provided on the Question Paper. Section B Answer all questions. Write your answers in the spaces provided on the Question Paper. Electronic calculators may be used. You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B. The number of marks is given in brackets [ ] at the end of each question or part question. For examiner’s use only: Section A / 50 Section B / 30 This paper consists of 20 printed pages. [Turn over 98 trendylineThis This paperapconsists of consists2020printed pages.rinted pagestrendyline

Section A Answer all questions. Write your answer in the spaces provided. 1 Figure 1.1 shows the alimentary canals of two mammals, an insect-eating bat, which is a carnivore, and a rabbit, which is a herbivore. Figure 1.1 (a)Name the organs labelled V and W. [2] V W (b)Explain the role of mechanical digestion. [3] 99 trendyline

Scientists investigated digestion in different species of mammal. The mammals that they studied ranged in size from an elephant shrew, Elephantulus edwardii, with a mass of 50 g to an ox, Bos taurus, with a mass of 220 kg. The scientists added indigestible particles to the animals’ food and timed how long the particles stayed in the digestive system. The results for 24 different mammal species are shown in Figure 1.2. Figure 1.2 The scientists concluded that food stays longer in the digestive systems of larger mammals compared with smaller mammals. (c)Discuss the evidence from Figure 1.2, for and against the statement that food stays longer in the digestive systems of larger mammals. [4] [Total: 9 marks] 100 trendyline

2 (a)Figure 2.1 shows the human heart and the main blood vessels. The functions of the parts of the heart and some of the blood vessels are given in Table 2.1. Figure 2.1 Complete Table 2.1. [4] Table 2.1 function letter on Figure 2.1 name structure that separates oxygenated and deoxygenated blood structure that prevents backflow of blood from ventricle to atrium blood vessel that carries deoxygenated blood chamber of the heart that contains deoxygenated blood 101 trendyline

(b)A group of students used a heart monitor to record the pulse rate of an athlete during a 5000-metre race. The recordings started just before the race began and ended just after it had finished, as shown in Figure 2.2. Figure 2.2 (i)Use data from Figure 2.2 to describe the effect of exercise on the pulse rate of the athlete. [3] 102 trendyline

(ii)Explain the change in pulse rate between 2 minutes and 3 minutes after the recordings started. [4] [Total: 11 marks] 3 Catalase is an enzyme that breaks down hydrogen peroxide inside cells. Red blood cells contain catalase. Some dogs have an inherited condition in which catalase is not produced. This condition is known as acatalasia and it is caused by a mutation in the gene for catalase. (a)Define the terms gene and gene mutation. [2] gene gene mutation 103 trendyline

(b)A geneticist was asked to investigate the inheritance of acatalasia in dogs. The normal allele is represented by B and the mutant allele is represented by b. The geneticist made the diagram in Figure 3.1 to show the inheritance of acatalasia in a family of dogs. The shaded symbols indicate the dogs with acatalasia. Figure 3.1 (i)State the genotypes of the dogs identified as 1, 2 and 3 in Figure 3.1. [3] 1 2 3 (ii)The geneticist crossed dog 4 with dog 5. Approximately half of the offspring had acatalasia and half the offspring did not have acatalasia. Construct a genetic diagram to show how this is possible. [4] (iii)State the name given to the type of cross that you have completed in (b)(ii). [1] [Total: 10 marks] - End of Section A1 - 104 trendyline [[

Name: Index Number: Class: CATHOLICHIGH SCHOOL Preliminary Examination 3 Secondary 4 A2 BIOLOGY 5158/02 Paper 2 Friday 16 September 2016 1 hour 45 minutes Additional Materials: - READ THESE INSTRUCTIONS FIRST Write your name, index number and class on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE ON THE MARGINS. Section A Answer all questions. Write your answers in the spaces provided on the Question Paper. Section B Answer all questions. Write your answers in the spaces provided on the Question Paper. Electronic calculators may be used. You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B. The number of marks is given in brackets [ ] at the end of each question or part question. For examiner’s use only: Section A / 50 Section B / 30 This paper consists of 20 printed pages. [Turn over 105 trendylineSection BB dl iThis paperconsists of of 202printed pages. trendyline

4 Excretion is the process of removing waste products of metabolism from the body. (a)Name the two main products of metabolism that need to be excreted from the human body. [2] 1 2 (b)The kidney is one of the main excretory organs of the body. Its role is to filter the blood. Some substances leave the blood and are removed from the body in the urine. The concentration of protein in the blood entering the kidneys in the renal arteries is 83 g dm-3. State the concentration of protein that you would expect in the urine of a healthy person and explain your answer. [2] concentration g dm-3 explanation (c)Dialysis can be used to treat people whose kidneys do not function properly. Figure 4.1 shows dialysis treatment. Figure 4.1 106 trendylineFigure 4.1Figure 4 yli

Use Figure 4.1 to describe the process of dialysis and explain changes that occur in a person’s blood. [5] (d)Some people with kidney failure are given a kidney transplant. State one advantage and one disadvantage of having a kidney transplant instead of dialysis treatment. [2] advantage disadvantage [Total: 11 marks] 107 trendyline