Mock test. 1 hour and 45 minutes. 95 marks available.
Each time the test is taken it will present different questions.
GCSE OCR Combined Science B Papers 1 and 5
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Why not try another Science Mock Exam and see how well you do?
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#1. What is the resolution of electron microscopes limited by?
#2. Electron microscopes have much higher resolution and magnification than light microscopes. What are the advantages of this?
#3. Why is catalysis by enzymes important for life processes?
#4. Why do plants need oxygen?
#5. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ..... + water
#6. When fossil fuels are burned they release carbon into the atmosphere - which of the following are fossil fuels?
#7. 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.
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#8. Why does the rate of an enzyme controlled reaction plateau at a certain substrate concentration? ? plateau means level out
#9. In active transport - are particles travelling with or against the concentration gradient?
#10. Which sub-cellular structures can be found in bacteria?
Select all that apply:
#11. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?
#12. Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?
#13. Which term do we use to describe the relationships between species that depend on each other for resources?
#14. What is the name of the chemicals that we use to transmit messages through the blood to organs?
#15. What is the molecular formula for glucose?
#16. Capillaries are only one cell thick and have thousands of branches. What is the function of capillaries?
#17. The pacemaker cells tell the heart when to beat, where are they located?
#18. What is the word equation for photosynthesis? ? In some examples you might also see sunlight and chlorophyll above and below the arrow.
#19. What is the role of the central nervous system (CNS)?
#20. Which of the following organisms belong to the kingdom - animals?
Select all that apply:
#21. True or false - A concentration gradient is the difference in concentration from high to low?
#22. Nitrogen is often found in a particular form in the soil what is this form?
#23. Which type of factor is competition?
#24. Where does blood entering the heart through the pulmonary veins come from?
#25. Sensory neurones have a fatty layer of insulation, what is it called?
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#26. Palisade cells are found just below the epidermis of leaves. What is their role and how are they adapted to perform it?
#27. Which of the following is part of the central nervous system (CNS)?
#28. What are cells that line structures in the body and have cilia?
#29. What is the purpose of respiration?
#30. What is an advantage of anaerobic respiration?
#31. 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?
#32. Through which process do nutrients enter root hair cells from the soil?
#33. True or false - A passive process is automatic and does not require energy?
#34. Growth hormone stimulates cells in muscles and bones to divide. It also stimulates another system, which system is this?
#35. What is the difference between aerobic and anaerobic respiration?
#36. Which square instrument do we use for randomly sampling population sizes?
#37. Motor neurones carry impulses to which part of the nervous system?
#38. Predators are essential for healthy ecosystems - what happens if predators are removed due to extinction?
#39. The Nervous System is made up of two parts, the Central Nervous System (CNS) and what other part?
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#40. 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.
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#41. By which process does water in the oceans and lakes move into the atmosphere?
#42. Why is the rate of an enzyme controlled reaction lower at lower temperatures?
#43. 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?
#44. Is respiration an exothermic or an endothermic reaction?
#45. Organs that exchange substances into and out of the body have:
#46. Which type of factor is parasitism?
#47. How do substances typically move into and out of the body, for example, oxygen in the lungs? ? 1 word answer
#48. What is the cell wall made from in plants?
#49. What is the function of the cell wall?
#50. Why is the binomial naming system useful for scientists?
#51. Which of these is an effector?
#52. Which type of factor is nutrient availability?
#53. Where does blood from the aorta travel to?
#54. What are cilia?
#55. Which hormone is associated with the "fight or flight" response?
#56. 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.
#57. What is the name of the protein which moves particles across cell membranes during active transport?
#58. What is the role of starch synthase?
#59. Which type of white blood cells produce antibodies that stick to the antigens of pathogens?
#60. What is the process by which organisms remove waste from their bodies?
#61. True or false - carbon dioxide is removed from the atmosphere as it dissolves in the oceans?
#62. What is the resolution of light microscopes limited by?
#63. What is stroke volume measured in?
#64. What is the binomial name for humans?
#65. Is photosynthesis an endothermic or an exothermic reaction?
#66. What is enzyme specificity?
#67. Which of the following are prokaryotes?
Select all that apply:
#68. What travels along neurones to pass information through the nervous system?
#69. Which of these is the correct explanation for why photosynthesis is slower at lower temperatures?
#70. Why do high breathing and heart rates remain after exercise?
Select all that apply:
#71. By which process does water in the clouds move onto land?
#72. What are the monomers of fats/lipids?
#73. Why is there a size limit to cells?
#74. What is stroke volume?
#75. The water cycle has one part where water is in solid form - what is that form of storage?
#76. What is the field of view of a microscope?
#77. Increases in thyroxine concentration in the blood cause a decrease in the amount of thyroxine released. What kind of feedback mechanism is this?
#78. Where does blood from the pulmonary artery travel to?
#79. Which parts of the heart and blood vessels stop blood from flowing in the wrong direction?
#80. Urea is produced when amino acids are broken down. Which organ processes urea?
#81. Surfaces where diffusion takes place allowing substances to enter the body usually have which characteristics?
Select all that apply:
#82. What natural source of nitrogen is sometimes added to fields by farmers?
#83. What is an active site?
#84. How can we increase the accuracy of abundance estimates?
#85. Which of the following are 3 of the adaptations of leaves for efficient photosynthesis?
Select all that apply:
#86. What do we mean by the distribution of organisms?
#87. What are the monomers of proteins?
#88. What is the function of white blood cells?
#89. Which of the following are strategies organisms use to adapt to changing abiotic conditions?
Select all that apply:
#90. The respiratory system relies on diffusion of oxygen and carbon dioxide. Which of the following statements are correct?
Select all that apply:
#91. Why do plants need nitrogen?
#92. Which type of factor is pollution?
#93. Which of the following is the correct word equation for aerobic respiration?
#94. What is the part of the heart that the arrows are pointing to?
#95. Cells are adapted to perform a specific function. Why do cells in the pancreas have lots of ribosomes?
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