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. What is meant by an active process?

#2. What is the role of the nucleus?

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

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

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

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

#7. How do substances typically move into and out of the body, for example, oxygen in the lungs? ? 1 word answer

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

Select all that apply:

#9. What is the role of DNA synthase?

#10. The left ventricle has a thicker muscle wall, why is this the case?

#11. Fill in the gap to complete the word equation for aerobic respiration. glucose + oxygen → ….. + water

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

#13. What is the function of white blood cells?

#14. Which type of white blood cells produce antibodies that stick to the antigens of pathogens?

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

GCSE heart diagram missing aorta

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

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

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

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

#20. What is the role of receptors?

#21. What is an active site?

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

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

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

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

#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. What is the role of ribosomes?

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

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

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

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

#32. 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:

The Heart GCSE

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

#34. What is the function of platelets?

#35. What are enzymes?

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

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

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

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

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

Select all that apply:

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

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

#43. 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.

#44. What is the function of plasma?

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

#46. What is enzyme activity?

#47. In which part of the cell does anaerobic respiration take place?

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

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

#50. When is adrenaline released?

#51. What is the role of protease?

#52. How many chambers does the heart have?

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

Select all that apply:

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

#55. Arteries carry blood around the body, do they carry blood away from or towards the heart?

Remember – Arteries Away

#56. What is enzyme specificity?

#57. What are cilia?

#58. What are substrates?

#59. What does μm stand for?

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

1

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

Select all that apply:

#62. 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?

#63. Palisade cells are found just below the epidermis of leaves. What is their role and how are they adapted to perform it?

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

#65. What is the name of the protein which moves particles across cell membranes during active transport?

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

#67. Which description most accurately describes osmosis?

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

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

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

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

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

#73. What is stroke volume measured in?

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

The Heart GCSE

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

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

#77. What is the role of lipase?

#78. What is the resolution of electron microscopes limited by?

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

Heart Diagram missing right atrium

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

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

Select all that apply:

#82. What is the role of glycogen synthase?

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

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

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

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

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

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

#89. What is stroke volume?

#90. Why is there a size limit to cells?

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