GCSE OCR Biology B Paper 2

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OCR Biology B Paper 2

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OCR Biology B Paper 2

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#1. By which process does water in the oceans and lakes move into the atmosphere?

#2. Electron microscopes have much higher resolution and magnification than light microscopes. What are the advantages of this?

#3. Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?

#4. What is the definition of resolution?

#5. Which type of factor is competition?

#6. Why is the rate of an enzyme controlled reaction lower at lower temperatures?

#7. What do we call an organ that is affected by a specific hormone?

#8. Which description most accurately describes osmosis?

#9. Capillaries are only one cell thick and have thousands of branches. What is the function of capillaries?

#10. What do we call animals that eat both other animals and plants?

#11. What is the role of starch synthase?

#12. What is the role of amylase?

#13. Place the measurement units in order from from biggest to smallest. micrometres, picometres, kilometres, metres, nanometres, millemetres ? Use British Spelling - Metres* NOT Meters

#14. Which of the following organisms belong to the kingdom – animals?

Select all that apply:

#15. Through which process do nutrients enter root hair cells from the soil?

#16. What is meant by an active process?

#17. What is the Lock and Key Model of enzyme action?

#18. What is the binomial name for humans?

#19. What is the role of glycogen synthase?

#20. Producers are organisms which do what?

#21. Which of the following features are found in arteries?

#22. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.

#23. How much of the atmosphere is composed of nitrogen?

#24. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats

#25. 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:

#26. True or false – A concentration gradient is a term used to explain how the moon moves in the night sky?

#27. Which of these is a population?

#28. What is the correct order of groups in the Linnaean Classification system?

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#29. Which of these is an effector?

#30. Why do high breathing and heart rates remain after exercise?

Select all that apply:

#31. Which type of factor is soil composition?

#32. What is the role of the superior vena cava?

#33. What are biotic factors?

#34. Which of the following is part of the central nervous system (CNS)?

#35. Which of these substances is sometimes added to water to make it potable?

#36. What is the role of effectors?

#37. Which of the following are prokaryotes?

Select all that apply:

#38. Which term do we use to describe the relationships between species that depend on each other for resources?

#39. Which are the two kinds of sampling we normally use?

Select all that apply:

#40. What is the role of protease?

#41. What are enzymes?

#42. If grass is eaten by a rabbit and a rabbit is eaten by a hawk. What level of consumer is the hawk?

#43. Fill in the gap: Receptors detect pain and send impulses via the sensory neurone towards the spinal cord. The ………………… intercepts the signal and diverts it along motor neurones to the effectors (muscles) which quickly move away from the source of pain.

#44. What is the function of red blood cells (Erythrocytes)?

#45. In what part of the cells does aerobic respiration take place?

#46. Predators are essential for healthy ecosystems – what happens if predators are removed due to extinction?

#47. Which of the following is the equation for total magnification?

#48. What is the difference between aerobic and anaerobic respiration?

#49. Which type of factor is parasitism?

#50. Which type of white blood cells produce antibodies that stick to the antigens of pathogens?

#51. What is the role of the cell membrane?

Select all that apply:

#52. Which organisms maintain the nitrogen levels in the soil?

#53. Why can humans only survive a few days without water?

#54. What are the lower chambers of the heart called?

#55. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus

Select all that apply:

#56. Which of these is an ecosystem?

#57. Name two resources that both animals and plants need to survive and reproduce? ? structure your answer like this: ..... and .....

#58. What are the three domains?

#59. Which hormone is associated with the “fight or flight” response?

#60. What natural source of nitrogen is sometimes added to fields by farmers?

#61. The drug called Digitalis slows the heart rate. Where does the drug come from?

#62. Which sub-cellular structures can be found in plants?

Select all that apply:

#63. Which system is responsible for ensuring the supply of oxygen and glucose to cells?

#64. How many chambers does the heart have?

#65. Is respiration an exothermic or an endothermic reaction?

#66. Which of the following is an effect stimulated by the thyroxine hormone?

#67. What is the role of lipase?

#68. What is the field of view of a microscope?

#69. Why do plants need nitrogen?

#70. What is the role of the acrosome on a sperm cell?

#71. Which parts of the heart and blood vessels stop blood from flowing in the wrong direction?

#72. Multicellular organisms are too large to allow diffusion through their cells to provide the necessary resources. Instead we have transport systems. What is the name of the transport system that uses capillaries to transport substances via the blood?

#73. Which type of factor is disease?

#74. What is the function of plasma?

#75. How many chromosomes does a single sperm cell have?

#76. How are cells that line the small intestine specialised?

#77. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?

#78. What is the role of receptors?

#79. What is the role of ribosomes?

#80. Which of these is a habitat?

#81. What is enzyme specificity?

#82. Where are nitrogen-fixing bacteria found in plants such as peas and beans?

#83. Which type of white blood cell engulfs (surrounds) foreign cells in order to digest them?

#84. What is the resolution of electron microscopes limited by?

#85. Cells are adapted to perform a specific function. Why do cells in the pancreas have lots of ribosomes?

#86. Through which process would air in a space station move if someone opened a door to space?

#87. Surfaces where diffusion takes place allowing substances to enter the body usually have which characteristics?

Select all that apply:

#88. What do we call animals that are eaten by other animals?

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#89. Where does blood from the pulmonary artery travel to?

#90. Why is the Surface area : Volume ratio so important when it comes to exchange of substances?

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