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Cellular Respiration and ATP Synthesis · CAPE Biology Unit 2

147 past-paper questions on Cellular Respiration and ATP Synthesis, part of Bioenergetics and Conservation, from every CAPE Biology Unit 2 paper on Quelpr.

Practise Cellular Respiration and ATP Synthesis
  1. 1(a)2 marks· Biology · Unit 2 Q1 1(a)Write a balanced chemical equation to summarize the process of aerobic respiration.
  2. 1(a)5 marks· Biology · Unit 2 Q1 1(a)On the grid provided on page 5, use appropriate scales and axes to draw a graph of the results obtained in Table 1. Provide an appropriate title for your graph and place hair length on the x-axis.
  3. 1(a)(i)5 marks· Biology · Unit 2 Q1 1(a)(i)On the diagram in Figure 1, insert the names of the FIVE intermediates shown.
  4. 1(a)(i)4 marks· Biology · Unit 2 Q1 1(a)(i)Identify the reactants or products labelled A, B, C, D, E and F in Figure 1. Write your answers in the relevant spaces in Figure 1.
  5. 1(a)(i)3 marks· Biology · Unit 2 Q1 1(a)(i)List THREE products of the link reaction.
  6. 1(a)(ii)3 marks· Biology · Unit 2 Q1 1(a)(ii)Explain the significance of the process labelled X in Figure 1.
  7. 1(a)(ii)2 marks· Biology · Unit 2 Q1 1(a)(ii)Identify which TWO of the reactions, labelled W–Z, uses ATP.
  8. 1(a)(ii)1 mark· Biology · Unit 2 Q1 1(a)(ii)State the site of the link reaction.
  9. 1(a)(iii)6 marks· Biology · Unit 2 Q1 1(a)(iii)Identify the name and function of the structures labelled Q, R and S in Figure 1.
  10. 1(a)(iii)2 marks· Biology · Unit 2 Q1 1(a)(iii)State the total number of NADH and pyruvate molecules produced from a single glucose molecule during glycolysis.
  11. 1(a)(iv)5 marks· Biology · Unit 2 Q1 1(a)(iv)Complete the diagram below to identify the reduced molecules produced. You MUST include the arrows to show where the molecules were produced in the Kreb's cycle.
  12. 1(b)2 marks· Biology · Unit 2 Q1 1(b)State TWO precautions which should have been taken during this investigation.
  13. 1(b)(i)3 marks· Biology · Unit 2 Q1 1(b)(i)In the box below, draw a labelled diagram to show the detailed structure of a mitochondrion. NOTE: No title is required.
  14. 1(b)(i)2 marks· Biology · Unit 2 Q1 1(b)(i)State TWO similarities between fermentation (anaerobic respiration) reactions in animals and yeast.
  15. 1(b)(i)5 marks· Biology · Unit 2 Q1 1(b)(i)Complete the diagram in Figure 2 and include labels to illustrate the structure of a mitochondrion.
  16. 1(b)(i)3 marks· Biology · Unit 2 Q1 1(b)(i)State THREE ways in which lactic acid fermentation and the method of anaerobic respiration shown in Figure 2 are similar.
  17. 1(b)(i)2 marks· Biology · Unit 2 Q1 1(b)(i)State a suitable hypothesis for the experiment.
  18. 1(b)(ii)2 marks· Biology · Unit 2 Q1 1(b)(ii)On your diagram, use labelled arrows to identify FOUR key substances of cellular respiration that move out of the mitochondrion.
  19. 1(b)(ii)1 mark· Biology · Unit 2 Q1 1(b)(ii)State the name of the two-carbon molecule which is produced during oxidative decarboxylation of pyruvate.
  20. 1(b)(ii)8 marks· Biology · Unit 2 Q1 1(b)(ii)Explain how the structure of the mitochondrion is important for its function in respiration.
  21. 1(b)(ii)3 marks· Biology · Unit 2 Q1 1(b)(ii)Explain the function of the fermentation reactions in organisms.
  22. 1(b)(ii)1 mark· Biology · Unit 2 Q1 1(b)(ii)State a suitable control for the experiment.
  23. 1(b)(iii)2 marks· Biology · Unit 2 Q1 1(b)(iii)Identify the manipulated and responding variable in this experiment.
  24. 1(b)(iv)1 mark· Biology · Unit 2 Q1 1(b)(iv)Using the data in Table 1, identify which of the two beans respired faster.
  25. 1(c)(i)2 marks· Biology · Unit 2 Q1 1(c)(i)Define the following terms: Continuous variation; Discontinuous variation.
  26. 1(c)(i)12 marks· Biology · Unit 2 Q1 1(c)(i)Discuss the importance of the following components of oxidative phosphorylation: The formation of a proton gradient.
  27. 1(c)(ii)1 mark· Biology · Unit 2 Q1 1(c)(ii)Suggest the type of variation which was investigated in this experiment.
  28. 1(c)(ii)12 marks· Biology · Unit 2 Q1 1(c)(ii)Discuss the importance of the following components of oxidative phosphorylation: The synthesis of ATP.
  29. 1(c)(iii)1 mark· Biology · Unit 2 Q1 1(c)(iii)Identify the type of graph that would be suitable for representing the data from the second experiment.
  30. 1(c)(iii)5 marks· Biology · Unit 2 Q1 1(c)(iii)On the grid provided on page 7, construct a bar graph that shows a comparison between both strains of yeast at the given temperatures.
  31. 1(c)(iii)12 marks· Biology · Unit 2 Q1 1(c)(iii)Discuss the importance of the following components of oxidative phosphorylation: The role of oxygen.
  32. 1(c)(iv)4 marks· Biology · Unit 2 Q1 1(c)(iv)State TWO conclusions which can be made from the data given in Table 1. You MUST give a reason to support EACH conclusion.
  33. 1(d)(iii)6 marks· Biology · Unit 2 Q1 1(d)(iii)With the use of a genetic diagram, explain the results of a cross between a moth with brown wings and a moth with white wings that produces all offspring with brown wings.
  34. 1(d)(iv)1 mark· Biology · Unit 2 Q1 1(d)(iv)Suggest the genotype of the parent with brown wings.
  35. 1(e)2 marks· Biology · Unit 2 Q1 1(e)Suggest how the creation of the new type of diamond back moth differs from the formation of moths with a different wing colour.
  36. 3(a)1 mark· Biology · Unit 2 Q3 3(a)Define the term 'movement'.
  37. 3(b)4 marks· Biology · Unit 2 Q3 3(b)Complete the table below to outline TWO distinctions between movement in plants and animals.
  38. 3(c)6 marks· Biology · Unit 2 Q3 3(c)List THREE major functions of the human skeleton, other than locomotion, and name ONE bone that is responsible for EACH function listed.
  39. 3(d)4 marks· Biology · Unit 2 Q3 3(d)Complete the table below to outline TWO disadvantages of complete immobility in living organisms and state ONE consequence of EACH.
  40. 4(a)4 marks· Biology · Unit 2 Q4 4(a)State the name of TWO processes by which organisms reproduce asexually. For EACH process, provide ONE example of an organism which reproduces in this way.
  41. 4(a)(i)4 marks· Biology · Unit 2 Q4 4(a)(i)Name the reproductive structures labelled A, B, C and D.
  42. 4(a)(ii)1 mark· Biology · Unit 2 Q4 4(a)(ii)State how the flower in Figure 1 is pollinated.
  43. 4(a)(iii)1 mark· Biology · Unit 2 Q4 4(a)(iii)Give ONE reason for the method of pollination stated in (a) (ii).
  44. 4(b)2 marks· Biology · Unit 2 Q4 4(b)Asexual reproduction is NOT suitable for organisms which live in an environment that changes often. Explain ONE reason to support this statement.
  45. 4(b)6 marks· Biology · Unit 2 Q4 4(b)Complete the table below to state THREE ways in which pollination differs from fertilization.
  46. 4(c)(i)2 marks· Biology · Unit 2 Q4 4(c)(i)Define the following terms: Gene.
  47. 4(c)(i)1 mark· Biology · Unit 2 Q4 4(c)(i)Name the process of cell division which leads to the cultivation of sugar cane.
  48. 4(c)(ii)2 marks· Biology · Unit 2 Q4 4(c)(ii)Define the following terms: Allele.
  49. 4(c)(ii)2 marks· Biology · Unit 2 Q4 4(c)(ii)Provide TWO reasons to explain how the process named in (c) (i) leads to the propagation of sugar cane.
  50. 4(d)(i)5 marks· Biology · Unit 2 Q4 4(d)(i)Using a genetic diagram, show the cross between Mary's parents.
  51. 4(d)(ii)1 mark· Biology · Unit 2 Q4 4(d)(ii)State Mary's genotype:
  52. 4(d)(iii)1 mark· Biology · Unit 2 Q4 4(d)(iii)Based on the results of the cross in (d) (i), state the probability of a child having attached earlobes.
  53. 5(a)2 marks· Biology · Unit 2 Q5 5(a)State TWO functions of the human skeleton.
  54. 5(b)2 marks· Biology · Unit 2 Q5 5(b)Name the TWO muscles labelled X and Y. X:, Y:.
  55. 5(c)(i)2 marks· Biology · Unit 2 Q5 5(c)(i)Name the type of joints found in EACH of the following: Knee:, Hip:.
  56. 5(c)(ii)3 marks· Biology · Unit 2 Q5 5(c)(ii)Explain ONE way in which the function of the knee and hip joints are similar and ONE way in which the function of the knee joint differs from the hip joint.
  57. 5(d)4 marks· Biology · Unit 2 Q5 5(d)Suggest FOUR ways in which the animal may be affected by the broken limb.
  58. 5(e)2 marks· Biology · Unit 2 Q5 5(e)Describe ONE way in which the growth of the plant differs from that of the puppy.
  59. 2(a)(i)1 mark· CAPE Biology Unit 2 · 2003 · Paper 1State which molecule accepts the 2H from NADH2 during anaerobic respiration in animals.
  60. 2(a)(ii)1 mark· CAPE Biology Unit 2 · 2003 · Paper 1State the product of anaerobic respiration in animals.
  61. 2(a)(iii)2 marks· CAPE Biology Unit 2 · 2003 · Paper 1State TWO products produced under similar anaerobic conditions in plants.
  62. 2(b)2 marks· CAPE Biology Unit 2 · 2003 · Paper 1In animals, explain what happens to the product formed during anaerobic respiration when oxygen becomes available again.
  63. 2(c)2 marks· CAPE Biology Unit 2 · 2003 · Paper 1Suggest TWO reasons for this decline in yeast population.
  64. 2(d)2 marks· CAPE Biology Unit 2 · 2003 · Paper 1State TWO advantages of using natural enzymes rather than an inorganic catalyst to catalyse the breakdown of carbohydrate solutions.
  65. 6(a)(ii)1 mark· CAPE Biology Unit 2 · 2003 · Paper 1What is the MAIN chemical process that causes the effect at days 9 to 10?
  66. 6(c)(i)2 marks· CAPE Biology Unit 2 · 2003 · Paper 1To delay fruit ripening, shippers may reduce oxygen levels to 5% and increase nitrogen levels correspondingly. What other process, which also produces CO2, must be guarded against, and why?
  67. 4(a)(i)2 marks· CAPE Biology Unit 2 · 2004 · Paper 2Explain the need for the initial phosphorylations during the process of glycolysis.
  68. 4(a)(ii)2 marks· CAPE Biology Unit 2 · 2004 · Paper 2Explain the need for the presence of adenosine diphosphate (ADP) during the process of glycolysis.
  69. 4(a)(iii)2 marks· CAPE Biology Unit 2 · 2004 · Paper 2Explain the need for the presence of inorganic phosphate during the process of glycolysis.
  70. 4(a)(iv)2 marks· CAPE Biology Unit 2 · 2004 · Paper 2Explain the need for the presence of nicotinamide adenine dinucleotide phosphate (NADP) / NAD during the process of glycolysis.
  71. 4(a)(v)2 marks· CAPE Biology Unit 2 · 2004 · Paper 2Explain the need for the conversion of hexose to triose during the process of glycolysis.
  72. 4(b)5 marks· CAPE Biology Unit 2 · 2004 · Paper 2"The anaerobic pathway used by animals has more potential for energy conservation than anaerobic respiration in plants." Discuss this statement by reference to the TWO pathways.
  73. 4(c)5 marks· CAPE Biology Unit 2 · 2004 · Paper 2Discuss the value to humans of ethanol production by microorganisms.
  74. 9(a)10 marks· CAPE Biology Unit 2 · 2004 · Paper 2Define the term 'transgenic animal' OR 'transgenic plant'. Outline the method by which a transgenic plant AND a transgenic animal can be produced.
  75. 9(b)5 marks· CAPE Biology Unit 2 · 2004 · Paper 2Discuss the environmental safety and ethical implications of genetically modified foods AND human clones.
  76. 9(c)5 marks· CAPE Biology Unit 2 · 2004 · Paper 2Define the term 'restriction enzyme'. Design, in outline, an experiment to show how a restriction enzyme can be used to remove a section of a genome.
  77. 1(a)4 marks· CAPE Biology Unit 2 · 2005 · Paper 2Outline an experiment, based on the apparatus in Figures 1 A and B, to measure oxygen uptake in germinating beans.
  78. 1(b)1 mark· CAPE Biology Unit 2 · 2005 · Paper 2State the purpose of the thermometers used in the experimental apparatus in Figures 1 A and B.
  79. 1(c)2 marks· CAPE Biology Unit 2 · 2005 · Paper 2Suggest whether the beans soaked in potassium cyanide will take up oxygen and provide ONE reason for your answer.
  80. 1(d)1 mark· CAPE Biology Unit 2 · 2005 · Paper 2State what conclusion can be drawn from the results of Experiment 1 shown in Figure 2.
  81. 1(e)2 marks· CAPE Biology Unit 2 · 2005 · Paper 2An artificial lipid vesicle with a proton pump and ATP synthase is used to pump hydrogen ions into the vesicle to create a gradient, which diffuse out through ATP synthase to produce ATP. What conclusion can be drawn…
  82. 4(a)(i)4 marks· CAPE Biology Unit 2 · 2006 · Paper 2Clarify the actions and purposes of the oxidative and decarboxylative reactions which occur in the mitochondria during the entry and processing of pyruvic acid.
  83. 4(a)(ii)6 marks· CAPE Biology Unit 2 · 2006 · Paper 2Clarify the actions and purposes of the oxidative and decarboxylative reactions which occur in the mitochondria during the rotation of the Krebs cycle.
  84. 4(b)10 marks· CAPE Biology Unit 2 · 2006 · Paper 2With the aid of a diagram, give an account of the process of oxidative phosphorylation (the electron transport chain), to show the roles of hydrogen and electron carriers, phosphate compounds and oxygen in the…
  85. 4(a)2 marks· CAPE Biology Unit 2 · 2007 · Paper 2State TWO specific cellular processes that require energy in living organisms, providing brief explanations of why energy is required for each.
  86. 4(b)(i)2 marks· CAPE Biology Unit 2 · 2007 · Paper 2Explain what is meant by the term 'glycolysis'.
  87. 4(b)(ii)6 marks· CAPE Biology Unit 2 · 2007 · Paper 2Describe, in their correct sequence, SIX major steps in glycolysis.
  88. 4(c)(i)6 marks· CAPE Biology Unit 2 · 2007 · Paper 2Discuss the statement that 'anaerobic respiration is considered to be inefficient, in terms of energy, when compared to aerobic respiration', referring to SIX points.
  89. 4(c)(ii)4 marks· CAPE Biology Unit 2 · 2007 · Paper 2Discuss, using FOUR points, the importance of lactate production during sustained vigorous exercise.
  90. 9(a)(i)3 marks· CAPE Biology Unit 2 · 2007 · Paper 2Explain what is meant by the term 'restriction enzymes' and state their normal function in nature.
  91. 9(a)(ii)7 marks· CAPE Biology Unit 2 · 2007 · Paper 2Describe how restriction enzymes are used in genetic engineering using plasmids, bacteria, and gene probes to produce recombinant DNA containing a transplanted gene.
  92. 9(b)(i)4 marks· CAPE Biology Unit 2 · 2007 · Paper 2Comment on therapeutic procedures used to treat a genetic disorder.
  93. 9(b)(ii)6 marks· CAPE Biology Unit 2 · 2007 · Paper 2Give reasons why most countries prohibit the application of germ cell therapy in humans while permitting somatic cell therapy.
  94. 1(a)6 marks· CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2Explain how the respirometer apparatus is used to measure the rate of oxygen uptake by organisms.
  95. 1(b)(i)1 mark· CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2Suggest a control for this experiment.
  96. 1(b)(ii)4 marks· CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2Plot the results for the germinating peas at 25 °C on the graph grid provided.
  97. 1(b)(iii)2 marks· CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2Calculate the rate of oxygen consumption for germinating peas at BOTH temperatures (10 °C and 25 °C) using the time interval between 10 and 20 minutes.
  98. 1(b)(iv)a)1 mark· CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2Comment on the differences in oxygen consumption observed between germinating peas at 10 °C and 25 °C.
  99. 1(b)(iv)b)1 mark· CAPE Biology Unit 2 · 2008 (Rest of Region) · Paper 2Comment on the differences in oxygen consumption observed between germinating and dry peas.
  100. 1(a)(i)2 marks· CAPE Biology Unit 2 · 2008 (T&T) · Paper 2Label the structures highlighted as I and II on Figure 1.
  101. 1(a)(ii)2 marks· CAPE Biology Unit 2 · 2008 (T&T) · Paper 2State the main function of each of the structures labelled I and II in cellular respiration.
  102. 1(a)(iii)2 marks· CAPE Biology Unit 2 · 2008 (T&T) · Paper 2Calculate the length of the mitochondrion shown in Figure 1, showing all steps.
  103. 1(b)3 marks· CAPE Biology Unit 2 · 2008 (T&T) · Paper 2State two structural similarities and one structural difference between chloroplasts and mitochondria.
  104. 1(c)6 marks· CAPE Biology Unit 2 · 2008 (T&T) · Paper 2Using an annotated diagram only, explain how energy is generated in the respiratory chain reaction in mitochondria.
  105. 1(a)6 marks· CAPE Biology Unit 2 · 2009 · Paper 2Explain how the apparatus shown in Figure 1 is used to investigate the rate of oxygen uptake of the germinating peas in the respirometer.
  106. 1(b)1 mark· CAPE Biology Unit 2 · 2009 · Paper 2State ONE way in which the apparatus in Figure 1 could be modified to determine the effect of temperature on oxygen uptake by germinating peas.
  107. 1(c)(i)5 marks· CAPE Biology Unit 2 · 2009 · Paper 2On Figure 2, label EACH of the stages with C to indicate decarboxylation reactions and H to indicate dehydrogenation reactions.
  108. 1(c)(ii)1 mark· CAPE Biology Unit 2 · 2009 · Paper 2State EXACTLY where the Krebs cycle occurs in a cell.
  109. 1(c)(iii)2 marks· CAPE Biology Unit 2 · 2009 · Paper 2Briefly explain the role of NAD in the Krebs cycle, in relation to energy production.
  110. 4(a)(i)4 marks· CAPE Biology Unit 2 · 2010 · Paper 2Explain what is meant by the term 'glycolysis' and state where it takes place in the cell.
  111. 4(a)(ii)4 marks· CAPE Biology Unit 2 · 2010 · Paper 2Aerobic respiration is represented by C6H12O6 + 6 O2 -> 6 CO2 + 6 H2O. Discuss FOUR reasons why this equation does NOT fully represent respiration.
  112. Q51 mark · multiple choice· CAPE Biology Unit 2 · 2011 · Paper 1Which of the following substances are present in the matrix of a mitochondrion? I. Glucose II. Adenosine diphosphate III. Adenosine triphosphate IV. Acetyl co-enzyme A
  113. Q61 mark · multiple choice· CAPE Biology Unit 2 · 2011 · Paper 1During aerobic respiration in mammals, pyruvic acid is
  114. Q71 mark · multiple choice· CAPE Biology Unit 2 · 2011 · Paper 1Items 7 - 8 refer to the apparatus below which is set up to determine the rate of respiration of germinating seeds. Which of the following statements explain why the apparatus is left in the water for five minutes…
  115. Q81 mark · multiple choice· CAPE Biology Unit 2 · 2011 · Paper 1Items 7 - 8 refer to the apparatus below which is set up to determine the rate of respiration of germinating seeds. Another set of apparatus is set up in exactly the same way but glass beads are used instead of…
  116. Q61 mark · multiple choice· CAPE Biology Unit 2 · 2012 · Paper 1In muscle tissue undergoing strenuous contractions, the formation of lactate is due to the
  117. Q71 mark · multiple choice· CAPE Biology Unit 2 · 2012 · Paper 1Which of the following statements explain why the apparatus is left in the water for five minutes before readings are taken? I. To allow water to fill the capillary tube. II. To stabilise the pressure of the apparatus.…
  118. Q81 mark · multiple choice· CAPE Biology Unit 2 · 2012 · Paper 1In anaerobic respiration, the maximum number of ATP molecules that may be produced from a molecule of glucose is
  119. Q111 mark · multiple choice· CAPE Biology Unit 2 · 2012 · Paper 1The two MAIN products of oxidative phosphorylation in the mitochondrion are
  120. 1(a)(iii)2 marks· CAPE Biology Unit 2 · 2012 · Paper 2State ONE difference between the Calvin cycle and Krebs cycle (do NOT state the site of pathways as a difference).
  121. 1(b)(i)4 marks· CAPE Biology Unit 2 · 2012 · Paper 2Describe the changes in blood lactate and glucose levels over the exercise period for cyclists who used pyruvate supplements.
  122. 1(b)(ii)2 marks· CAPE Biology Unit 2 · 2012 · Paper 2Account for the trend observed in blood lactate levels during the first 60 minutes of the cycling activity.
  123. 1(b)(iii)1 mark· CAPE Biology Unit 2 · 2012 · Paper 2Based on the data in Figure 2, suggest what conclusion may be drawn regarding the effect of pyruvate supplements on aerobic performance.
  124. Q51 mark · multiple choice· CAPE Biology Unit 2 · 2013 · Paper 1Mitochondria in muscle have more cristae than mitochondria in skin cells. What is the significance of this?
  125. Q61 mark · multiple choice· CAPE Biology Unit 2 · 2013 · Paper 1During aerobic respiration in mammals, pyruvic acid is
  126. Q71 mark · multiple choice· CAPE Biology Unit 2 · 2013 · Paper 1Which of the following contributes MOST electrons to the electron transport chain?
  127. Q81 mark · multiple choice· CAPE Biology Unit 2 · 2013 · Paper 1Item 8 refers to the following flow diagram which shows the pathways involved in anaerobic respiration in yeast. Which of the stages, labelled 1, 2 and 3, involve(s) decarboxylation?
  128. 1(a)(i)1 mark· CAPE Biology Unit 2 · 2013 · Paper 2State the region of the cell where glycolysis takes place.
  129. 1(a)(ii)2 marks· CAPE Biology Unit 2 · 2013 · Paper 2Describe what occurs at each of the stages labelled 1, 2, 3 and 4 in Figure 1.
  130. 1(a)(iii)2 marks· CAPE Biology Unit 2 · 2013 · Paper 2Suggest the significance of the pathway shown in Figure 1.
  131. Q51 mark · multiple choice· CAPE Biology Unit 2 · 2014 · Paper 1Mitochondria in muscle have more cristae than mitochondria in skin cells. What is the significance of this?
  132. Q61 mark · multiple choice· CAPE Biology Unit 2 · 2014 · Paper 1Which of the following is the name of Substance X?
  133. Q71 mark · multiple choice· CAPE Biology Unit 2 · 2014 · Paper 1Which of the following correctly identifies the location of Stage 4 in a eukaryotic cell?
  134. Q81 mark · multiple choice· CAPE Biology Unit 2 · 2014 · Paper 1The chemical at X is MOST likely
  135. Q91 mark · multiple choice· CAPE Biology Unit 2 · 2014 · Paper 1Which two of the following MOST likely explain the movement of the paraffin drop towards the syringe? I. Oxygen is used by the beans. II. Carbon dioxide is absorbed by X. III. Oxygen is absorbed by X. IV. Carbon…
  136. 1(a)(i)4 marks· CAPE Biology Unit 2 · 2014 · Paper 2Identify the structures labelled A, B, C and D in Figure 1.
  137. 1(a)(ii)1 mark· CAPE Biology Unit 2 · 2014 · Paper 2Using an arrow labelled X on Figure 1, indicate the site of the Krebs cycle.
  138. Q51 mark · multiple choice· CAPE Biology Unit 2 · 2015 · Paper 1At what stage does oxidative phosphorylation occur?
  139. Q71 mark · multiple choice· CAPE Biology Unit 2 · 2015 · Paper 1Which of the following lists the chemical groupings found within an ATP molecule?
  140. Q81 mark · multiple choice· CAPE Biology Unit 2 · 2015 · Paper 1Yeast is a key component in wine making. The MAIN purpose of the yeast is to
  141. Q91 mark · multiple choice· CAPE Biology Unit 2 · 2015 · Paper 1Which of the following contributes the MOST electrons to the electron transport chain?
  142. 1(b)(i)6 marks· CAPE Biology Unit 2 · 2015 · Paper 2Using an annotated diagram of a simple respirometer constructed from a plastic syringe and capillary tube, outline the procedure for measuring respiration in germinating seeds.
  143. 1(b)(ii)5 marks· CAPE Biology Unit 2 · 2015 · Paper 2Suggest FIVE precautions to be taken to ensure the accuracy and reliability of the results when conducting an experiment using a simple respirometer.
  144. 4(a)6 marks· CAPE Biology Unit 2 · 2016 · Paper 2With reference to key steps, explain how the net production of high energy compounds is achieved in glycolysis.
  145. 1(a)(i)3 marks· CAPE Biology Unit 2 · 2018 · Paper 2Writing your answer in Figure 1, insert the number of carbon atoms contained in EACH of the compounds labelled B to G (example provided for Compound A).
  146. 1(a)(ii)1 mark· CAPE Biology Unit 2 · 2018 · Paper 2Writing your answer in Figure 1, insert the input and product at the point numbered 4, as completed for points 1, 2, 3 and 5.
  147. 1(a)(iii)4 marks· CAPE Biology Unit 2 · 2018 · Paper 2Explain the TWO MAIN roles of the Krebs cycle.

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