Bioenergetics

• What is the compensation point?

  The light intensity at which the rate of photosynthesis is equal to the respiration of a plant
• Which of the following are reactants in photosynthesis?

  Carbon dioxide and water
• Which of the following absorbs the energy required by photosynthesis?

  Chlorophyll
• Which of the following is required to produce amino acids from glucose?

  Nitrates
• Which of the following are true of the effects of temperature on photosynthesis?

  At high temperatures lower than at where enzymes are denatured, respiration reduces yields from photosynthesis.
• Which of the following could best explain why a student studying bubbles of oxygen given off from pondweed obtained a result of 81 in one experiment, and 9 bubbles in a second experiment? - Higher


  The student moved the pondweed from a distance of 10 cm away from the light source in the first experiment, to 30 cm away in the second
• In an investigation on photosynthesis, why did a student add sodium hydrogencarbonate to the water?

  As a source of carbon dioxide
• Which of the following best explains why a plant breeder placed open bags containing a fungus around his greenhouse? - Higher


  The fungi will respire and release carbon dioxide into the greenhouse.
• Which parts of the electromagnetic spectrum are absorbed by the chlorophyll molecule?

  Red and blue parts of the spectrum
• Which of the following is a difference between plants adapted to sunny, and plants adapted to shady conditions?


  The compensation point is lower in shade adapted plants
• Which of the following is NOT a function of respiration?

  The transport of substances in the xylem
• Where does the process of anaerobic respiration occur?


  In the cytoplasm of the cell
• Which of the following are true about aerobic and anaerobic respiration?

  Aerobic respiration produces much more energy per glucose molecule than anaerobic respiration
• Which of the following is the breakdown product of amino acids in humans?

  Urea
• Which of the following is the maximum efficiency of aerobic respiration?

  40 to 50 per cent
• Which of the following is produced when a plant respires anaerobically?

  Alcohol and carbon dioxide
• Which of the following best explains why yeast is used to make bread?

  The carbon dioxide produced by anaerobic respiration makes the dough rise
• Which of the following statements is true of the process of respiration in animals and plants?

  The process is identical in animals and plants
• Which of the following is able to respire anaerobically?

  Yeast
• Which of the following is true of a supreme athlete after exercise? - Higher

  Lactic acid is taken to the liver in the blood