GCSE OCR Biology A Papers 1 and 3

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OCR Biology A Papers 1 and 3

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OCR Biology A Papers 1 and 3

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

#2. What is the function of the cell wall?

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

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

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

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

Select all that apply:

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

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

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

Select all that apply:

#10. Which of the following is the equation for total magnification?

#11. What effects does adrenaline have on the heart?

Select all that apply:

#12. 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.

#13. What is meant by an active process?

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

#15. The pacemaker cells tell the heart when to beat, where are they located?

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

#17. Which of these are examples of blood vessels?

Select all that apply:

#18. What is the role of coronary arteries?

#19. What are two systems which allow your body to respond to its surroundings?

Select all that apply:

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

#21. What do we call an organ that is affected by a specific hormone?

#22. What is enzyme activity?

#23. Where are relay neurones found?

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

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

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

#27. What is the Lock and Key Model of enzyme action?

#28. What is enzyme specificity?

#29. How are cells that line the small intestine specialised?

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

#31. Which system is responsible for ensuring the supply of oxygen and glucose to cells?

#32. How many chambers does the heart have?

#33. Which of the following are prokaryotes?

Select all that apply:

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

#35. What is the gap between neurones called?

#36. What are the monomers of proteins?

#37. Place the measurement units in order from from biggest to smallest. micrometres, picometres, kilometres, metres, nanometres, millemetres ? Use British Spelling - Metres* NOT Meters

#38. Which description most accurately describes osmosis?

#39. What is the purpose of respiration?

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

Select all that apply:

#41. What is stroke volume?

#42. Hormones are released by a range of glands, name one gland that releases hormones. ? do not include the word "gland" or "glands"

#43. Which of the following descriptions best matches the hormonal system?

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

Select all that apply:

#45. Which process in the body produces carbon dioxide?

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

#47. What does μm stand for?

#48. What is the role of receptors?

#49. Name one hormone that is released from the ovaries?

#50. What is the role of glycogen synthase?

#51. What is the role of protease?

#52. What effect does adrenaline have on the liver?

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

#54. In what part of the cells does aerobic respiration take place?

#55. What is stroke volume measured in?

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

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

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

#59. What are substrates?

The Heart GCSE

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

#61. Which of the following sub-cellular structures provides structure and support for the cell?

Select all that apply:

#62. When is adrenaline released?

#63. Growth hormone stimulates cells in muscles and bones to divide. It also stimulates another system, which system is this?

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

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

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

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

Select all that apply:

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

The Heart GCSE

#69. Where does blood from the pulmonary artery travel to?

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

#71. Glucose enters the body via the?

#72. Why does the rate of an enzyme controlled reaction go down as temperature increases past the optimum level?

#73. What is an active site?

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

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

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

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

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

Select all that apply:

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

Select all that apply:

#81. The Nervous System is made up of two parts, the Central Nervous System (CNS) and what other part?

3

#82. Which of these is an effector?

#83. Which type of white blood cell engulfs (surrounds) foreign cells in order to digest them?

#84. What is the role of amylase?

#85. What is the role of the nucleus?

#86. What is an advantage of anaerobic respiration?

#87. Which pathway is used when rapid automatic responses are needed by your body to external stimuli, like touching a hot object?

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

#89. Through which process would air freshener sprayed in one corner of a room disperse?

#90. What is the Induced Fit Model of enzyme action?

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