Form 3 and 4 BIO T3 Exams.pdf

Northeast comprehensive school End of Year exam June 2024 Subject: Biology Form: 4 Paper 2 Duration: 2 hours 30 minutes READ THE FOLLOWING INSTRUCTIONS CAREFUL...

Northeast comprehensive school End of Year exam June 2024 Subject: Biology Form: 4 Paper 2 Duration: 2 hours 30 minutes READ THE FOLLOWING INSTRUCTIONS CAREFULLY. 1. This paper consists of SIX questions in TWO sections. Answer ALL questions. 2. Write your answers in the spaces provided in this booklet. 3. Where appropriate, answers should be illustrated with diagrams. 4. If you need to rewrite any answer and there is not enough space to do so on the original page, you must use the extra lined page(s) provided at the back of this booklet. Remember to draw a line through your original answer. 5. If you use the extra page(s), you must write the question number clearly in the box provided at the top of the extra page(s) and, where relevant, include the question part beside the answer. NAME: _____________________________________________ DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.  SECTION A Answer ALL questions. Write your answers in the spaces provided. 1. Figure 1 shows micrographs of an animal and plant cell. Animal Cell Plant Cell https:/lib.bioninja.com.au/standard-levelltopic-1-cell-biology/ 12-ultrastructure-of-cells/cell-micrographs.html Figure 1. Micrographs of an animal cell and a plant cell a. (i) What type of microscope was used to produce the images shown in Figure 1? ………………………………………………………………………………………………….. (1 mark) (ii) Draw a large, clearly labelled diagram of ONE plant cell from the micrograph shown in Figure I. (9 marks)  (iii) List TWO similarities between the plant cell and the animal cell......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2 marks) (iv) The most prominent structure on the animal cell electron micrograph carries genetic information in the form of DNA. State the name of the structure. …………………………………………………………………………………………………… (1 mark) b. The diagram in Figure 2 shows the general structure of a bacterial cell. Figure 2. General structure of a bacterial cell (i) Identify ONE similarity between the bacterial cell and a plant cell. ………………………………………………………………………………………….. …………………………………………………………………………………………. (1 mark) (ii) The structures of the bacterial cell are especially suited for its role in infecting other organisms. Table I lists four of these structures. Complete Table I by explaining how EACH structure help the bacterium to infect organisms. An example has been provided for you. (6 marks) c. Human beings are multicellular and are made up of a large variety of cells. (i) Complete Table 2 by distinguishing between the following cells: Red blood cells Skin cells Nerve cells (4 marks) (ii) Name ONE feature that would enable a scientist to distinguish a spherical bacterial cell from an animal cell when viewed under a microscope. …………………………………………………………………………………………... (1 mark) Total 25 marks 2. (a) Complete Table 3 by listing the final digestive products of the three macronutrients. TABLE 3: MACRONUTRIENTS AND FINAL PRODUCTS OF DIGESTION (2 marks) (b) Outline how the final products of the digestion of protein and fat are transported from the gut to the liver. Protein …………………………………………………………………………………………………. ………………………………………………………………………………………………………….. ………………………………………………………………………………………………………….. Fat ………………………………………………………………………………………………….. …………………………………………………………………………………………………………. …………………………………………………………………………………………………………. (2 marks) (c) The pancreas plays an important role in the digestion of food and the homeostatic control of blood sugar levels. (i) Explain the role of the pancreas in the digestion of food. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. (3 marks)  (ii) The line diagram below summarizes the role of the pancreatic hormones in the control of blood glucose levels. Complete the diagram by filling in the boxes with the names of Hormones X and Y. (2 marks) (d) Explain the role of the liver in the homeostatic control of blood glucose levels. ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… (2 marks) (e) Figure 3 shows the variation in blood glucose concentration for two persons, A and B, during the course of 48 hours. Use the information in Figure 3 to answer the questions that follow. Figure 3. Variation in blood glucose concentration over 48 hours (i) Which person is MOST likely suffering from diabetes mellitus? Give ONE reason for your answer. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. ………………………………………………………………………………………….. (2 marks) (ii) Based on the data in Figure l, suggest the range for blood glucose concentration in a healthy person. ………………………………………………………………………………………….. ………………………………………………………………………………………….. (1 mark) Total 15 marks 3. (a) (i) Organisms can either be unicellular or multicellular. State ONE example of a unicellular organism. …………………………………………………………………………………………. (1 mark) (ii) List THREE materials that can be transported in multicellular organisms. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. (3 marks) (iii) Explain why multicellular organisms require transport systems while unicellular organisms do not. Include TWO reasons in your response. …………………………………………………………………………………………. …………………………………………………………………………………………. …………………………………………………………………………………………. ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… (4 marks) (b) (i) Define the terms 'translocation' and 'transpiration'. ……………………………………………………………………………………….. ………………………………………………………………………………………. ………………………………………………………………………………………. ………………………………………………………………………………………. ………………………………………………………………………………………. ………………………………………………………………………………………. ………………………………………………………………………………………. (2 marks) (ii) Explain TWO ways in which the structure of the xylem is suited for its role in transpiration. ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… (4 marks) (iii) Suggest how the structure of the phloem allows it to deliver nutrients to the sieve elements. …………………………………………………………………………………….. ……………………………………………………………………………………. (1 mark) Total 15 marks  SECTION B Answer ALL questions. Write your answers in the spaces provided. 4. (a) Define the following terms: Diffusion ………………………………………………………………………………… ………………………………………………………………………………………………... Breathing ……………………………………………………………………………….. ……………………………………………………………………………………………….. Respiration ………………………………………………………………………………. ………………………………………………………………………………………………. (3 marks) (b) Name the THREE muscles in the ribcage which are responsible for breathing in humans. ……………………………………………………………………………………………….. ……………………………………………………………………………………………….. ………………………………………………………………………………………………. (3 marks) (c) Explain how the process of gaseous exchange occurs in the lungs. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (5 marks)  (d) Explain how human beings use anaerobic respiration during exercise. ……………………………………………………………………………………………….. ………………………………………………………………………………………………. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (4 marks) Total 15 marks 5. (a) Define the terms ‘excretion’ and ‘egestion’. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… …………………………………………………………………………………………….. (2 marks) (b) In humans, several organs are responsible for excretion. List TWO organs of excretion and for EACH organ, state ONE substance which is excreted from it. Excretory Organ ……………………………………………………………….. Substance Excreted ………………………………………………………………. Excretory Organ ……………………………………………………………….. Substance Excreted ………………………………………………………………. (4 marks) (c) Figure 4 is a labelled diagram of a nephron. Use Figure 4 to describe how urine is formed. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (5 marks)  (d) Explain TWO ways in which plants conserve water. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (4 marks) Total 15 marks 6. (a) Red and white blood cells are important components of human blood. Use clearly labelled diagrams to illustrate the structure of a red blood cell and the structure of a white blood cell.  (6 marks) (b) Explain how any TWO features of a red blood cell ensures that it is suitable for its major function in the human body. ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… (4 marks) (c) Marianne, a one-month-old baby acquires immunity from her mother through breastfeeding. Marianne’s father accidentally punctures his finger with a nail but does not need a tetanus antiserum injection because he received a tetanus vaccine the previous year. Explain how the type of immunity that Marrianne acquired from breastfeeding differs from the type of immunity that her father acquired from his vaccine. In your explanation, state the name of EACH type of immunity. ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… (5 marks) Total 15 marks End of Exam  Extra Writing Space ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………  Northeast comprehensive school End of Year exam June 2024 Subject: Biology Form: 3 Paper 2 Duration: 2 hours 10 minutes READ THE FOLLOWING INSTRUCTIONS CAREFULLY. 6. This paper consists of SIX questions in TWO sections. Answer ALL questions in section ONE and ONLY ONE in section TWO. 7. Write your answers in the spaces provided in this booklet. 8. Where appropriate, answers should be illustrated with diagrams. 9. If you need to rewrite any answer and there is not enough space to do so on the original page, you must use the extra lined page(s) provided at the back of this booklet. Remember to draw a line through your original answer. 10. If you use the extra page(s), you must write the question number clearly in the box provided at the top of the extra page(s) and, where relevant, include the question part beside the answer. NAME: _____________________________________________ DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SO.  SECTION A Answer ALL questions. Write your answers in the spaces provided. 1. (a) List THREE kingdoms other than the animal kingdom into which organisms can be classified. …………………………………………………………………………………………………. …………………………………………………………………………………………………. …………………………………………………………………………………………………. (3 marks) (b) Fish are organisms that belong to the animal kingdom. Figure 1 shows six species of fish (A-F) that live on coral reefs in the Caribbean. Figure 1. Six species of fish (A-F) that live on coral reefs in the Caribbean. (i) List THREE visible characteristics that may be used to classify the fish in Figure 4. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (3 marks)  (ii) Using any ONE of the characteristics listed in (b) (i). arrange the fish species (A-F) into two groups, I and II, in Table 1 below. TABLE 3. SPECIES OF FISH ARRANGED INTO TWO GROUPS, I AND II (4 marks) (c) (i) Define the term ‘conservation' as used in biology. …………………………………………………………………………………………... …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… (1 mark) (ii) Fish populations which live on coral reefs in the Caribbean are under threat of extinction due to predation and pollution. Explain TWO methods of conservation that may be used to minimize these threats. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (4 marks) Total 15 marks 2. (a) Define EACH of the following terms: (i) Saprophytic nutrition........................................................................................................................................................................................................................................................................................................................ (1 mark) (ii) Heterotrophic nutrition........................................................................................................................................................................................................................................................................................................................ (1 mark) (iii) Autotrophic nutrition....................................................................................................................................................................................................................................................................................................................... (1 mark) (b) Complete Table 2 identifying TWO saprophytes and their food sources. TABLE 2: SAPROPHYTES AND THEIR FOOD SOURCES (4 marks) (c) Explain TWO processes by which the raw (inorganic) materials required for making nutrients reach the leaves of a plant. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… (4 marks)  (d) Describe how photosynthesis occurs in a flowering plant. Your explanation must state what occurs in the light and dark reactions. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… (4 marks) Total 15 marks 3. Figure 2 below shows a typical plant and animal cell. Figure 2. Typical plant cell and typical animal cell (a) Identify the structures labelled A, B, C and D. (i) A ………………………………………………………………………………………….. B ………………………………………………………………………………………….. C ………………………………………………………………………………………….. D …………………………………………………………………………………………. (2 marks)  (ii) State the function of any THREE of the structures identified in (a) (i). ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… (3 marks) (b) (i) State the expected observation if EACH of the cell types were placed in DISTILLED water for 15 minutes. Suggest one reason for EACH observation. Plant Cell Observation: …………………………………………………………………………………………. Reason ………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… (2 marks) Animal Cell Observation: …………………………………………………………………………………………. Reason ………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… (2 marks) (c) Using TWO named examples, explain why cell specialization is important for cells to function effectively. ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… (4 marks) Total 15 marks 4. Figure 3 is a diagram of a terrestrial food web. (a) Using the food web illustrated in figure 3, identify a (i) producer ………………………………………………………………………………. (ii) predator ………………………………………………………………………………. (iii) primary consumer ……………………………………………………………………………… (3 marks) (b) State TWO roles of the producer in the food web. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (2 marks) (c) Identify ONE biotic factor and ONE abiotic factor that would affect the organisms shown in Figure 3. (i) Biotic ………………………………………………………………………………. (ii) Abiotic …………………………………………………………………………….. (2 marks) (d) (i) Explain why there are fewer organisms at the top than at the bottom of the food web. ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… (2 marks)  (ii) Discuss TWO possible consequences of the hawk becoming extinct in the eco- system shown in figure 3, ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… (4 mark) (e) Suggest TWO reasons why decomposers are important in all food webs. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… (2 marks) Total 15 marks  SECTION B Answer ONE question. Write your answers in the spaces provided. 5. Figure 4 shows micrographs of an animal and plant cell. Animal Cell Plant Cell https:/lib.bioninja.com.au/standard-levelltopic-1-cell-biology/ 12-ultrastructure-of-cells/cell-micrographs.html Figure 4. Micrographs of an animal cell and a plant cell a. (i) What type of microscope was used to produce the images shown in Figure 4? ………………………………………………………………………………………………….. (1 mark) (ii) Draw a large, clearly labelled diagram of ONE plant cell from the micrograph shown in Figure IV. (9 marks)  (iii) List TWO similarities between the plant cell and the animal cell......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2 marks) (iv) The most prominent structure on the animal cell electron micrograph carries genetic information in the form of DNA. State the name of the structure. …………………………………………………………………………………………………… (3 mark) b. The diagram in Figure 2 shows the general structure of a bacterial cell. Figure 2. General structure of a bacterial cell (iii) Identify ONE similarity between the bacterial cell and a plant cell. ………………………………………………………………………………………….. …………………………………………………………………………………………. (1 mark) (iv) The structures of the bacterial cell are especially suited for its role in infecting other organisms. Table I lists four of these structures. Complete Table I by explaining how EACH structure help the bacterium to infect organisms. An example has been provided for you. (6 marks) c. Human beings are multicellular and are made up of a large variety of cells. (iii) Complete Table 2 by distinguishing between the following cells: Red blood cells Skin cells Nerve cells (4 marks) (iv) Name ONE feature that would enable a scientist to distinguish a spherical bacterial cell from an animal cell when viewed under a microscope. …………………………………………………………………………………………... (1 mark) Total 25 marks 6. (a) Name the TWO raw materials and state the TWO conditions that are necessary for photosynthesis. Raw materials …………………………………………………………………………………. …………………………………………………………………………………………………. Conditions ……………………………………………………………………………………... …………………………………………………………………………………………………. (4 marks) (b) (i) Figure 5 is a drawing of a leaf. On the grid provided on the next page, make a drawing of the leaf that is twice the size of figure 5. Figure 5. Drawing of a leaf (3 marks) (ii) On the diagram that you draw on the next page, label EACH of the following parts of the leaf: apex, lamina, mid-rib and petiole. (4 marks) (c) Figure 6 shows a transverse section through a dicotyledonous leaf. (i) Label the following structures: V ……………………………………………………………………………. W …………………………………………………………………………… X ……………………………………………………………………………. Z ……………………………………………………………………………. (4 marks) (ii) State the function of the structure labelled Y. ……………………………………………………………………………………………… ……………………………………………………………………………………………… (1 mark) (iii) Explain THREE ways in which the internal structure of the leaf is adapted to carry out photosynthesis. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (6 marks) (iv) State THREE uses of the glucose produced after photosynthesis. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… (3 marks) Total 25 marks End of Exams  Extra Writing Space ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… …………………………………………………………………………………………………………