GCSE OCR Biology B Paper 1

Mock test. 1 hour and 45 minutes. 90 marks available.

Each time the test is taken it will present different questions.

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OCR Biology B Paper 1

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OCR Biology B Paper 1

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

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

#3. What is enzyme specificity?

#4. What does μm stand for?

#5. Why do plants need oxygen?

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

#7. What is the cell wall made from in bacteria?

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

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

#10. Which type of factor is soil composition?

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

#12. Organs that exchange substances into and out of the body have:

#13. Which of these processes allows saltwater to become potable?

#14. By which process does water in the clouds move onto land?

#15. What is stroke volume?

#16. The respiratory system relies on diffusion of oxygen and carbon dioxide. Which of the following statements are correct?

Select all that apply:

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

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

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

Select all that apply:

#20. Is active transport an active or a passive process?

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

Select all that apply:

#22. Is photosynthesis an endothermic or an exothermic reaction?

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

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

#25. What are enzymes?

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

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

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

#29. We sometimes use a transect to perform systematic sampling. This involves which of the following?

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

#31. In some areas where there are poor soils (not enough nitrogen) carnivorous plants have adapted to get their nitrogen from which source?

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

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

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

#35. Sensory neurones have a fatty layer of insulation, what is it called?

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#36. How does nitrogen in plants get into the soil?

#37. What is the role of amylase?

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

Remember:

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

#40. Motor neurones carry impulses to which part of the nervous system?

#41. What is the gap between neurones called?

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

Select all that apply:

#43. Which type of factor is water availability?

#44. What do we mean by the distribution of organisms?

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

#46. Is diffusion an active or a passive process?

#47. What are nitrogen-fixing bacteria?

#48. The male gametes (sperm cells) are adapted to their function. Which of the following are adaptations of sperm cells?

Select all that apply:

#49. What is the definition of resolution?

#50. Which sub-cellular structures can be found in animals?

Select all that apply:

#51. Which type of factor is predation?

Heart Diagram missing right atrium

#52. What is the part of the heart that the arrows are pointing to?

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

#54. 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.

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

Select all that apply:

#56. What are cilia?

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

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

#59. Which of these is a community?

#60. 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.

#61. What is the molecular formula for glucose?

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

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

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

Select all that apply:

#65. Which of the following are prokaryotes?

Select all that apply:

#66. What is the role of effectors?

#67. 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.

#68. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ….. + water

#69. What does abundance measure?

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

Select all that apply:

#71. What is an advantage of anaerobic respiration?

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

Select all that apply:

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

#74. Glucose enters the body via the?

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

#76. Specialised cells have different compositions of sub cellular structures in order to perform their role. Why would specialised cells have lots of mitochondria?

#77. Which of the following are waste products produced by the body?

Select all that apply:

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

#79. The water cycle has one part where water is in solid form – what is that form of storage?

#80. Urea is produced when amino acids are broken down. Which organ processes urea?

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

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

#83. What is the role of the inferior vena cava?

#84. Is osmosis an active or a passive process?

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

Select all that apply:

#86. What is the heart rate measured in?

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

#88. What is the role of the nucleus?

#89. What is the cell wall made from in plants?

#90. 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.

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