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

#2. What is the role of the superior vena cava?

#3. What is the role of starch synthase?

#4. What is the role of glycogen synthase?

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

#6. What is enzyme activity?

Heart Diagram missing right atrium

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

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

Select all that apply:

#9. What is the name of the chemicals that we use to transmit messages through the blood to organs?

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

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

Select all that apply:

#12. What is stroke volume measured in?

GCSE heart diagram missing aorta

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

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

#15. What are substrates?

#16. Which of the following features are found in arteries?

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

Select all that apply:

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

Select all that apply:

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

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

Select all that apply:

#21. What is an active site?

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

Select all that apply:

#23. The drug called Digitalis slows the heart rate. Where does the drug come from?

#24. Glucose enters the body via the?

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

#26. Which part of the heart separates the two sides?

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

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

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

#30. 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:

#31. What is the role of DNA synthase?

#32. What is the role of receptors?

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

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

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

Select all that apply:

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

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

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

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The Heart GCSE

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

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

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

#42. Which parts of the heart and blood vessels stop blood from flowing in the wrong direction?

#43. What is stroke volume?

#44. 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.

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

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

Select all that apply:

#47. What are cilia?

#48. Why does the rate of an enzyme controlled reaction plateau at a certain substrate concentration? ? plateau means level out

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

Select all that apply:

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

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

#52. Which of the following are factors that affect the rate of diffusion?

Select all that apply:

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

Select all that apply:

#54. Why does the rate of an enzyme controlled reaction increase with greater substrate concentration?

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

#56. Anaerobic respiration does not involve oxygen. Select the correct word equation for anaerobic respiration.

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

#58. What are the monomers of carbohydrates?

#59. What is the purpose of respiration?

#60. What is the function of platelets?

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

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

#63. What does μm stand for?

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

Select all that apply:

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

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

#67. What is the role of lipase?

#68. Oxygen enters the body via the?

#69. Which of the following describes metabolic rate?

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

#71. What travels along neurones to pass information through the nervous system?

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

The Heart GCSE

#73. Where does blood entering the heart through the pulmonary veins come from?

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

#75. What is the role of coronary arteries?

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

#77. Cardiac output is measured as the volume of blood pushed through the aorta each minute. Which is the correct equation for cardiac output?

#78. What is the function of plasma?

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

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

#81. What is the role of protease?

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

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#83. Which description most accurately describes osmosis?

#84. What is the role of ribosomes?

#85. Electron microscopes have much higher resolution and magnification than light microscopes. What are the advantages of this?

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

#87. Which hormone is released from the adrenal gland?

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

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

#90. What is an advantage of anaerobic respiration?

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