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GCSE OCR Combined Science B Papers 1 and 5
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#1. Is respiration an exothermic or an endothermic reaction?
#2. Which of the following are waste products produced by the body?
Select all that apply:
#3. Which type of white blood cell engulfs (surrounds) foreign cells in order to digest them?
#4. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?
Select all that apply:
#5. What do we call an organ that is affected by a specific hormone?
#6. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.
#7. By which process does water in the atmosphere become part of clouds?
#8. Which organisms maintain the nitrogen levels in the soil?
#9. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?
#10. The pacemaker cells tell the heart when to beat, where are they located?
#11. Which description most accurately describes osmosis?
#12. What are the monomers of fats/lipids?
#13. What are nitrogen-fixing bacteria?
#14. Why does the rate of an enzyme controlled reaction go down as temperature increases past the optimum level?
#15. What are the monomers of carbohydrates?
#16. What is the molecular formula for glucose?
#17. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.
#18. Surfaces where diffusion takes place allowing substances to enter the body usually have which characteristics?
Select all that apply:
#19. Which sub-cellular structures can be found in bacteria?
Select all that apply:
#20. Why do plants need nitrogen?
#21. Which of the following is the source of coal?
#22. Which of these is an ecosystem?
#23. Decomposers break down dead animal and plant material – what happens to the carbon inside the dead organisms?
#24. What is the resolution of electron microscopes limited by?
#25. What is the role of amylase?
#26. What is the role of the superior vena cava?
#27. What are the three domains?
#28. In osmosis – are particles travelling with or against the concentration gradient?
#29. What are the upper chambers of the heart called?
#30. What is the heart rate measured in?
#31. What is the purpose of respiration?
#32. What is the function of red blood cells (Erythrocytes)?
#33. Organs that exchange substances into and out of the body have:
#34. Which of the following are factors that affect the rate of diffusion?
Select all that apply:
#35. How do most plants get their nitrogen?
#36. Anaerobic respiration does not involve oxygen. Select the correct word equation for anaerobic respiration.
#37. What is stroke volume measured in?
#38. What does μm stand for?
#39. Which of the following are prokaryotes?
Select all that apply:
#40. Which of the following is the source of oil and gas?
#41. How many chromosomes does a single sperm cell have?
#42. Producers are organisms which do what?
#43. What are cilia?
#44. The drug called Digitalis slows the heart rate. Where does the drug come from?
#45. Where does blood entering the heart through the pulmonary veins come from?
#46. Which type of factor is parasitism?
#47. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?
#48. Which of the following is an effect stimulated by the thyroxine hormone?
#49. Which hormone is released from the adrenal gland?
#50. Is osmosis an active or a passive process?
#51. Why does the rate of an enzyme controlled reaction plateau at a certain substrate concentration? ? plateau means level out
#52. Where does the water in lakes and rivers end up?
#53. Motor neurones carry impulses to which part of the nervous system?
#54. During exercise, your cells require more oxygen and glucose. What changes in the body happen during exercise to meet these increased needs?
Select all that apply:
#55. Palisade cells are found just below the epidermis of leaves. What is their role and how are they adapted to perform it?
#56. Why can humans only survive a few days without water?
#57. What effects does adrenaline have on the heart?
Select all that apply:
#58. Place the measurement units in order from from biggest to smallest. micrometres, picometres, kilometres, metres, nanometres, millemetres ? Use British Spelling - Metres* NOT Meters
#59. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?
#60. In which sub-cellular structure inside plant cells does photosynthesis occur?
#61. True or false – volcanism removes carbon from the atmosphere
#62. In some areas where there are poor soils (not enough nitrogen) carnivorous plants have adapted to get their nitrogen from which source?
#63. Through which process do nutrients enter root hair cells from the soil?
#64. Which type of factor is pollution?
#65. Why is catalysis by enzymes important for life processes?
#66. Through which process do chemicals move across synapses?
#67. What is the function of plasma?
#68. Which sub-cellular structures can be found in plants?
Select all that apply:
#69. The left ventricle has a thicker muscle wall, why is this the case?
#70. What is the name of the chemicals that we use to transmit messages through the blood to organs?
#71. What effect does adrenaline have on the liver?
#72. What is an advantage of anaerobic respiration?
#73. Which of the following describes metabolic rate?
#74. Cardiac output is measured as the volume of blood pushed through the aorta each minute. Which is the correct equation for cardiac output?
#75. What is the role of receptors?
#76. What is the field of view of a microscope?
#77. How do we describe the periodic changes in population size of predators and prey – explained by increases in numbers of predators due to increased numbers of prey and then decreasing numbers of prey due to increasing numbers of predators and so on?
#78. Capillaries are only one cell thick and have thousands of branches. What is the function of capillaries?
#79. What are two systems which allow your body to respond to its surroundings?
Select all that apply:
#80. How many chambers does the heart have?
#81. The respiratory system relies on diffusion of oxygen and carbon dioxide. Which of the following statements are correct?
Select all that apply:
#82. Which of the following is part of the central nervous system (CNS)?
#83. What is the role of coronary arteries?
#84. When is adrenaline released?
#85. Sometimes it is not possible to measure the number of organisms in a transect, for example when measuring the distribution of plants. In this case we use an alternative measure called what?
#86. What are abiotic factors?
#87. What is the part of the heart that the arrows are pointing to?
#88. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ….. + water
#89. Specialised cells have different compositions of sub cellular structures in order to perform their role. Why would specialised cells have lots of mitochondria?
