Mock test. 1 hour and 45 minutes. 90 marks available.
Each time the test is taken it will present different questions.
GCSE OCR Biology A Papers 1 and 3
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Well Done you passed the test! You’re on your way to getting the grades you want!
Why not try another Science Mock Exam and see how well you do?
#1. What are substrates?
#2. When is adrenaline released?
#3. Place the measurement units in order from from biggest to smallest. micrometres, picometres, kilometres, metres, nanometres, millemetres ? Use British Spelling - Metres* NOT Meters
#4. How many chromosomes does a single sperm cell have?
#5. How are cells that line the small intestine specialised?
#6. Increases in thyroxine concentration in the blood cause a decrease in the amount of thyroxine released. What kind of feedback mechanism is this?
#7. What are the lower chambers of the heart called?
#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 effect does adrenaline have on the liver?
#10. Which pathway is used when rapid automatic responses are needed by your body to external stimuli, like touching a hot object?
#11. Which of the following descriptions best matches the hormonal system?
#12. What are cilia?
#13. What is the Induced Fit Model of enzyme action?
#14. What is the role of the acrosome on a sperm cell?
#15. How many chambers does the heart have?
#16. Why is catalysis by enzymes important for life processes?
#17. Through which process would air in a space station move if someone opened a door to space?
#18. True or false - A concentration gradient is the difference in concentration from high to low?
#19. The respiratory system relies on diffusion of oxygen and carbon dioxide. Which of the following statements are correct?
Select all that apply:
#20. What is the role of the central nervous system (CNS)?
#21. Is respiration an exothermic or an endothermic reaction?
#22. Where does blood from the pulmonary artery travel to?
#23. Why does the rate of an enzyme controlled reaction plateau at a certain substrate concentration? ? plateau means level out
#24. What is the gap between neurones called?
#25. What is the Lock and Key Model of enzyme action?
#26. The male gametes (sperm cells) are adapted to their function. Which of the following are adaptations of sperm cells?
Select all that apply:
#27. What is the cell wall made from in plants?
#28. Why is the Surface area : Volume ratio so important when it comes to exchange of substances?
#29. Which of the following is the equation for total magnification?
#30. Which system is responsible for ensuring the supply of oxygen and glucose to cells?
#31. What are the monomers of carbohydrates?
#32. What is the heart rate measured in?
#33. 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.
#34. What is the process by which organisms remove waste from their bodies?
#35. What is the cell wall made from in bacteria?
#36. What is an active site?
#37. True or false - A concentration gradient is a term used to explain how the moon moves in the night sky?
#38. Hormones are released by a range of glands, name one gland that releases hormones. ? do not include the word "gland" or "glands"
#39. In which part of the cell does anaerobic respiration take place?
#40. What is the function of plasma?
#41. What is meant by an active process?
#42. What is the role of the nucleus?
#43. What is the definition of resolution?
#44. Through which process do chemicals move across synapses?
#45. What are cells that line structures in the body and have cilia?
#46. Urea is produced when amino acids are broken down. Which organ processes urea?
#47. True or false - A passive process is automatic and does not require energy?
#48. What is the role of DNA synthase?
#49. What are the monomers of fats/lipids?
#50. What is the difference between aerobic and anaerobic respiration?
#51. Which of the following are factors that affect the rate of diffusion?
Select all that apply:
#52. Organs that exchange substances into and out of the body have:
#53. 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?
#54. What is the function of platelets?
#55. Which of the following features are found in arteries?
#56. What is enzyme specificity?
#57. What is the resolution of electron microscopes limited by?
#58. Which of the following describes metabolic rate?
#59. Specialised cells have different compositions of sub cellular structures in order to perform their role. Why would specialised cells have lots of mitochondria?
#60. Resting metabolic rate is measured under which of the following conditions?
Select all that apply:
#61. What is the role of protease?
#62. What is the role of starch synthase?
#63. During exercise, your cells require more oxygen and glucose. What changes in the body happen during exercise to meet these increased needs?
Select all that apply:
#64. Which structures in the lungs increase the surface area and therefore the speed and amount of gas exchanged?
#65. Oxygen enters the body via the?
#66. What are the monomers of proteins?
#67. Capillaries are only one cell thick and have thousands of branches. What is the function of capillaries?
#68. The pacemaker cells tell the heart when to beat, where are they located?
#69. What is stroke volume measured in?
#70. The left ventricle has a thicker muscle wall, why is this the case?
#71. What is the name of the chemicals that we use to transmit messages through the blood to organs?
#72. Anaerobic respiration does not involve oxygen. Select the correct word equation for anaerobic respiration.
#73. Glucose enters the body via the?
#74. The drug called Digitalis slows the heart rate. Where does the drug come from?
#75. Which of the following is part of the central nervous system (CNS)?
#76. What is the part of the heart that the arrows are pointing to?
#77. Which process in the body produces carbon dioxide?
#78. What is stroke volume?
#79. What is the role of ribosomes?
#80. What are the upper chambers of the heart called?
#81. What is the field of view of a microscope?
#82. Which of the following sub-cellular structures provides structure and support for the cell?
Select all that apply:
#83. The Nervous System is made up of two parts, the Central Nervous System (CNS) and what other part?
3
#84. 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.
#85. What is the purpose of respiration?
#86. What do we call an organ that is affected by a specific hormone?
#87. Is diffusion an active or a passive process?
#88. Electron microscopes have much higher resolution and magnification than light microscopes. What are the advantages of this?
#89. What is the part of the heart that the arrows are pointing to?
#90. What does μm stand for?
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