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GCSE OCR Biology A Papers 1 and 3
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#1. Which of the following are prokaryotes?
Select all that apply:
#2. In what part of the cells does aerobic respiration take place?
#3. What is the difference between aerobic and anaerobic respiration?
#4. When is adrenaline released?
#5. When an impulse reaches an axon terminal what happens?
#6. What are cilia?
#7. Where does blood from the pulmonary artery travel to?
#8. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ….. + water
#9. Why is the Surface area : Volume ratio so important when it comes to exchange of substances?
#10. How many chromosomes does a single sperm cell have?
#11. Through which process do nutrients enter root hair cells from the soil?
#12. Which sub-cellular structures can be found in animals?
Select all that apply:
#13. Where does blood entering the heart through the pulmonary veins come from?
#14. Growth is increased during puberty. Why is this?
#15. What is the role of the central nervous system (CNS)?
#16. What are the monomers of carbohydrates?
#17. Cardiac output is measured as the volume of blood pushed through the aorta each minute. Which is the correct equation for cardiac output?
#18. Which type of white blood cell engulfs (surrounds) foreign cells in order to digest them?
#19. Which of the following sub-cellular structures provides structure and support for the cell?
Select all that apply:
#20. What is the role of lipase?
#21. What is the cell wall made from in bacteria?
#22. Through which process do chemicals move across synapses?
#23. What effects does adrenaline have on the heart?
Select all that apply:
#24. What is the resolution of electron microscopes limited by?
#25. What is the purpose of respiration?
#26. The female gametes (egg cells) are adapted to their function. Which of the following are adaptations of egg cells?
Select all that apply:
#27. Resting metabolic rate is measured under which of the following conditions?
Select all that apply:
#28. Why does the rate of an enzyme controlled reaction go down as temperature increases past the optimum level?
#29. Oxygen enters the body via the?
#30. Arteries carry blood around the body, do they carry blood away from or towards the heart?
Remember – Arteries Away
#31. What is the role of receptors?
#32. What is stroke volume measured in?
#33. True or false – A passive process is automatic and does not require energy?
#34. What is the part of the heart that the arrows are pointing to?
#35. What is the function of plasma?
#36. In which part of the cell does anaerobic respiration take place?
#37. What is the role of the nucleus?
#38. Which hormone is released from the adrenal gland?
#39. The male gametes (sperm cells) are adapted to their function. Which of the following are adaptations of sperm cells?
Select all that apply:
#40. What do we call an organ that is affected by a specific hormone?
#41. Hormones are released by a range of glands, name one gland that releases hormones. ? do not include the word "gland" or "glands"
#42. What is the role of starch synthase?
#43. Urea is produced when amino acids are broken down. Which organ processes urea?
#44. What are two systems which allow your body to respond to its surroundings?
Select all that apply:
#45. 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:
#46. What is the role of amylase?
#47. Through which process would air in a space station move if someone opened a door to space?
#48. In osmosis – are particles travelling with or against the concentration gradient?
#49. What is the gap between neurones called?
#50. Which of these are examples of blood vessels?
Select all that apply:
#51. What is the role of the acrosome on a sperm cell?
#52. What is the function of platelets?
#53. Place the measurement units in order from from biggest to smallest. micrometres, picometres, kilometres, metres, nanometres, millemetres ? Use British Spelling - Metres* NOT Meters
#54. 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.
#55. What are substrates?
#56. Increases in thyroxine concentration in the blood cause a decrease in the amount of thyroxine released. What kind of feedback mechanism is this?
#57. What is the name of the protein which moves particles across cell membranes during active transport?
#58. Which of the following is an effect stimulated by the thyroxine hormone?
#59. Name one hormone that is released from the ovaries?
#60. What are the lower chambers of the heart called?
#61. Sensory neurones have a fatty layer of insulation, what is it called?
1
#62. Motor neurones carry impulses to which part of the nervous system?
#63. Which sub-cellular structures can be found in bacteria?
Select all that apply:
#64. Name one hormone that is produced in the pancreas?
#65. What is the Induced Fit Model of enzyme action?
#66. Which of the following is part of the central nervous system (CNS)?
#67. What is the role of ribosomes?
#68. Organs that exchange substances into and out of the body have:
#69. What is the definition of resolution?
#70. 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.
#71. What is the role of the cell membrane?
Select all that apply:
#72. Is osmosis an active or a passive process?
#73. Why is the rate of an enzyme controlled reaction lower at lower temperatures?
#74. Which of the following are waste products produced by the body?
Select all that apply:
#75. Which of the following describes metabolic rate?
#76. What is the role of protease?
#77. Why is there a size limit to cells?
#78. The left ventricle has a thicker muscle wall, why is this the case?
#79. 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.