GCSE OCR Biology B Paper 1

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OCR Biology B Paper 1

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OCR Biology B Paper 1

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#1. What is the binomial name for humans?

#2. What are substrates?

#3. Why do plants need nitrogen?

#4. 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?

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

#6. Which of the following features are found in veins?

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

#8. Nitrogen is often found in a particular form in the soil what is this form?

#9. Which of the following are the 4 factors that affect the rate of photosynthesis?

Select all that apply:

#10. Which of these is an effector?

#11. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.

#12. What is enzyme specificity?

#13. What is the function of plasma?

#14. Which type of factor is pollution?

#15. Why does the rate of an enzyme controlled reaction plateau at a certain substrate concentration? ? plateau means level out

#16. Which type of factor is parasitism?

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

#18. True or false – A concentration gradient is the difference in concentration from high to low?

#19. What are the upper chambers of the heart called?

#20. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.

#21. Which part of the heart separates the two sides?

#22. Growth is increased during puberty. Why is this?

#23. The 5 kingdoms of life are Animals, Plants, Fungi, Protists and Prokaryotes. Which kingdom do algae belong to?

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

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

#26. Why is catalysis by enzymes important for life processes?

#27. What is the role of protease?

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

#29. Arteries carry blood around the body, do they carry blood away from or towards the heart?

Remember – Arteries Away

#30. Which of the following describes metabolic rate?

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

#32. Which structures in the lungs increase the surface area and therefore the speed and amount of gas exchanged?

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

#34. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?

Select all that apply:

Remember to carefully read the question, if you selected Root hair cells, you were mistaken because the question asked about leaves, not roots.

#35. Bacterial cells commonly have a flagellum. What is the role of this structure?

#36. Through which process do chemicals move across synapses?

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

#38. Which description most accurately describes osmosis?

The Heart GCSE

#39. Where does blood from the aorta travel to?

#40. Why do plants need oxygen?

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

#42. By which process does water in the atmosphere become part of clouds?

#43. Why does the rate of an enzyme controlled reaction increase with greater substrate concentration?

#44. Increases in thyroxine concentration in the blood cause a decrease in the amount of thyroxine released. What kind of feedback mechanism is this?

#45. Which sub-cellular structures can be found in bacteria?

Select all that apply:

#46. In diffusion – are particles travelling with or against the concentration gradient?

#47. What is the function of white blood cells?

#48. What is the balanced chemical equation for photosynthesis?

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

#50. What is the role of the central nervous system (CNS)?

#51. True or false – plants remove carbon from the atmosphere during photosynthesis

#52. Which type of factor is nutrient availability?

#53. In osmosis – are particles travelling with or against the concentration gradient?

#54. When is adrenaline released?

#55. What are nitrogen-fixing bacteria?

#56. Which of the following is the source of oil and gas?

#57. What is the role of effectors?

#58. What is the role of the nucleus?

#59. How can we increase the accuracy of abundance estimates?

#60. What are cells that line structures in the body and have cilia?

#61. What are the monomers of carbohydrates?

#62. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?

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

#64. True or false – A passive process is automatic and does not require energy?

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

#66. When an impulse reaches an axon terminal what happens?

#67. How do most plants get their nitrogen?

#68. 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?

#69. Name one hormone that is produced in the pancreas?

#70. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?

#71. 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.

#72. The left ventricle has a thicker muscle wall, why is this the case?

#73. What does abundance measure?

#74. The female gametes (egg cells) are adapted to their function. Which of the following are adaptations of egg cells?

Select all that apply:

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

#76. Oxygen enters the body via the?

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

#78. Which of these is the correct explanation for why photosynthesis is slower at lower temperatures?

#79. Resting metabolic rate is measured under which of the following conditions?

Select all that apply:

#80. What is the process by which organisms remove waste from their bodies?

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

#82. What is the word equation for photosynthesis? ? In some examples you might also see sunlight and chlorophyll above and below the arrow.

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

#84. Why do we use systematic or random sampling of an area to determine the distribution or abundance of organisms?

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

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

#87. What is the gap between neurones called?

#88. What are the monomers of fats/lipids?

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

#90. What is enzyme activity?

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