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GCSE OCR Combined Science B Papers 1 and 5
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#1. Is active transport an active or a passive process?
#2. Which of the following is the source of coal?
#3. Which process in the body produces carbon dioxide?
#4. Hormones are released by a range of glands, name one gland that releases hormones. ? do not include the word "gland" or "glands"
#5. Which square instrument do we use for randomly sampling population sizes?
#6. Urea is produced when amino acids are broken down. Which organ processes urea?
#7. Which of these is an effector?
#8. Which sub-cellular structures can be found in animals?
Select all that apply:
#9. Why is the Surface area : Volume ratio so important when it comes to exchange of substances?
#10. What is the heart rate measured in?
#11. What are the lower chambers of the heart called?
#12. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?
#13. When an impulse reaches an axon terminal what happens?
#14. Which of the following is part of the central nervous system (CNS)?
#15. Which type of factor is nutrient availability?
#16. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.
#17. Which of the following is the source of oil and gas?
#18. What is stroke volume measured in?
#19. Which of these is an ecosystem?
#20. 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.
#21. How can we increase the accuracy of abundance estimates?
#22. What are two systems which allow your body to respond to its surroundings?
Select all that apply:
#23. Why do we use systematic or random sampling of an area to determine the distribution or abundance of organisms?
#24. Name one hormone that is produced in the pancreas?
#25. Which sub-cellular structures can be found in bacteria?
Select all that apply:
#26. Electron microscopes have much higher resolution and magnification than light microscopes. What are the advantages of this?
#27. 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.
#28. Which type of factor is air temperature?
#29. What is the name of the protein which moves particles across cell membranes during active transport?
#30. What is the cell wall made from in plants?
#31. What are biotic factors?
#32. True or false – volcanism removes carbon from the atmosphere
#33. Why does the rate of an enzyme controlled reaction increase with greater substrate concentration?
#34. Which of the following are prokaryotes?
Select all that apply:
#35. Why do plants need nitrogen?
#36. Cells are adapted to perform a specific function. Why do cells in the pancreas have lots of ribosomes?
#37. In what part of the cells does aerobic respiration take place?
#38. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?
#39. True or false – plants remove carbon from the atmosphere during photosynthesis
#40. What does abundance measure?
#41. Through which process do nutrients enter root hair cells from the soil?
#42. Which type of factor is soil composition?
#43. What are the monomers of fats/lipids?
#44. True or false – A passive process is automatic and does not require energy?
#45. Which of these is an effector?
#46. What is the role of the inferior vena cava?
#47. Which structures in the lungs increase the surface area and therefore the speed and amount of gas exchanged?
#48. What is the role of amylase?
#49. In a scientific investigation, you and two others randomly sample a rocky shore using quadrats. You find that on average there are 2 crabs per quadrat and the whole shore would be covered by 150 quadrats. Estimate how many crabs are on the whole shore.
#50. What is potable water?
#51. How much of the atmosphere is composed of nitrogen?
#52. Growth is increased during puberty. Why is this?
#53. What is the Lock and Key Model of enzyme action?
#54. The male gametes (sperm cells) are adapted to their function. Which of the following are adaptations of sperm cells?
Select all that apply:
#55. Through which process would air freshener sprayed in one corner of a room disperse?
#56. Which of these is a habitat?
#57. Which hormone is released from the adrenal gland?
#58. The respiratory system relies on diffusion of oxygen and carbon dioxide. Which of the following statements are correct?
Select all that apply:
#59. The left ventricle has a thicker muscle wall, why is this the case?
#60. Which system is responsible for ensuring the supply of oxygen and glucose to cells?
#61. Which term do we use to describe the relationships between species that depend on each other for resources?
#62. What is the role of starch synthase?
#63. Which of the following descriptions best matches the hormonal system?
#64. Which of these processes allows saltwater to become potable?
#65. Why does the rate of an enzyme controlled reaction go down as temperature increases past the optimum level?
#66. Where does the water in lakes and rivers end up?
#67. Oxygen enters the body via the?
#68. What is an active site?
#69. What are cilia?
#70. In which part of the cell does anaerobic respiration take place?
#71. What is the cell wall made from in bacteria?
#72. The female gametes (egg cells) are adapted to their function. Which of the following are adaptations of egg cells?
Select all that apply:
#73. What is groundwater?
#74. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?
#75. What is the definition of resolution?
#76. What is the field of view of a microscope?
#77. Why do high breathing and heart rates remain after exercise?
Select all that apply:
#78. Why can humans only survive a few days without water?
#79. What are cells that line structures in the body and have cilia?
#80. By which process does water in the oceans and lakes move into the atmosphere?
#81. What is the role of coronary arteries?
#82. Which of the following is the correct word equation for aerobic respiration?
#83. Is diffusion an active or a passive process?
#84. Which pathway is used when rapid automatic responses are needed by your body to external stimuli, like touching a hot object?
#85. What do we call animals that are eaten by other animals?
#86. What is the correct order of groups in the Linnaean Classification system?
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#87. How many chambers does the heart have?
#88. We sometimes use a transect to perform systematic sampling. This involves which of the following?
#89. What is the Induced Fit Model of enzyme action?
#90. What is the role of the cell membrane?
Select all that apply: