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GCSE OCR Combined Science B Papers 1 and 5
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#1. What is the definition of resolution?
#2. How much of the atmosphere is composed of nitrogen?
#3. Electron microscopes have much higher resolution and magnification than light microscopes. What are the advantages of this?
#4. Anaerobic respiration does not involve oxygen. Select the correct word equation for anaerobic respiration.
#5. What is the name of the protein which moves particles across cell membranes during active transport?
#6. Which type of factor is water availability?
#7. Which of these are examples of blood vessels?
Select all that apply:
#8. What is the equation for magnification?
There are two equations for magnification, both tell you how many times larger the image appears than it actually is.
One equation links the magnification of the two lenses and the other equation links magnification to the size of the object and image.
#9. What is the part of the heart that the arrows are pointing to?
#10. What do we mean by the distribution of organisms?
#11. Why is the rate of an enzyme controlled reaction highest at an optimum pH?
#12. Which structures in the lungs increase the surface area and therefore the speed and amount of gas exchanged?
#13. Who invented the binomial naming system?
Uh oh, maybe you need some lessons!
#14. True or false – plants remove carbon from the atmosphere during photosynthesis
#15. Growth is increased during puberty. Why is this?
#16. Is diffusion an active or a passive process?
#17. Which term do we use to describe the relationships between species that depend on each other for resources?
#18. Which type of factor is parasitism?
#19. What is the cell wall made from in plants?
#20. True or false – A passive process is automatic and does not require energy?
#21. What is the role of starch synthase?
#22. Which of the following descriptions best matches the hormonal system?
#23. Which of these processes allows saltwater to become potable?
#24. What is the role of the acrosome on a sperm cell?
#25. Which part of the heart separates the two sides?
#26. What is stroke volume measured in?
#27. What is the purpose of respiration?
#28. What is the function of white blood cells?
#29. What is an advantage of anaerobic respiration?
#30. Why does the rate of an enzyme controlled reaction go down as temperature increases past the optimum level?
#31. What is the binomial name for humans?
#32. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.
#33. Hormones are released by a range of glands, name one gland that releases hormones. ? do not include the word "gland" or "glands"
#34. What is the correct order of groups in the Linnaean Classification system?
Remember:
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#35. Which type of factor is nutrient availability?
#36. Where does the water in lakes and rivers end up?
#37. What are substrates?
#38. Which sub-cellular structures can be found in bacteria?
Select all that apply:
#39. Organs that exchange substances into and out of the body have:
#40. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.
#41. What is the cell wall made from in bacteria?
#42. Is photosynthesis an endothermic or an exothermic reaction?
#43. When an impulse reaches an axon terminal what happens?
#44. What is the role of amylase?
#45. Specialised cells have different compositions of sub cellular structures in order to perform their role. Why would specialised cells have lots of mitochondria?
#46. What is the role of DNA synthase?
#47. If grass is eaten by a rabbit and a rabbit is eaten by a hawk. What level of consumer is the hawk?
#48. When is adrenaline released?
#49. Is osmosis an active or a passive process?
#50. 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?
#51. In which sub-cellular structure inside plant cells does photosynthesis occur?
#52. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?
#53. What is the part of the heart that the arrows are pointing to?
#54. Through which process would air freshener sprayed in one corner of a room disperse?
#55. What is the role of protease?
#56. Why do plants need oxygen?
#57. What travels along neurones to pass information through the nervous system?
#58. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ….. + water
#59. By which process does water in the oceans and lakes move into the atmosphere?
#60. Which of the following is the correct word equation for aerobic respiration?
#61. Which type of factor is predation?
#62. Upon the release of adrenaline do blood vessels widen, narrow or both?
The blood vessels are constricted or dilated depending on where the blood flows.
The muscles required for running for example are dilated since they are required to match the “fight or flight” response. Others are constricted as they are temporarily deemed less important.
#63. Which pathway is used when rapid automatic responses are needed by your body to external stimuli, like touching a hot object?
#64. Which of the following organisms belong to the kingdom – animals?
Select all that apply:
#65. What do we call animals that only eat plants?
#66. What is the role of glycogen synthase?
#67. Place the measurement units in order from from biggest to smallest. micrometres, picometres, kilometres, metres, nanometres, millemetres ? Use British Spelling - Metres* NOT Meters
#68. Why is the binomial naming system useful for scientists?
#69. Where does blood from the aorta travel to?
#70. We sometimes use a transect to perform systematic sampling. This involves which of the following?
#71. Resting metabolic rate is measured under which of the following conditions?
Select all that apply:
#72. What are cells that line structures in the body and have cilia?
#73. True or false – volcanism removes carbon from the atmosphere
#74. Glucose enters the body via the?
#75. Which type of white blood cells produce antibodies that stick to the antigens of pathogens?
#76. Which of these is a population?
#77. Which sub-cellular structures can be found in plants?
Select all that apply:
#78. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?
#79. The drug called Digitalis slows the heart rate. Where does the drug come from?
#80. What is the role of receptors?
#81. What does μm stand for?
#82. Surfaces where diffusion takes place allowing substances to enter the body usually have which characteristics?
Select all that apply:
#83. Which of the following are the 4 factors that affect the rate of photosynthesis?
Select all that apply:
#84. Which of the following are factors that affect the rate of diffusion?
Select all that apply: