All living cells respire. This process releases the energy stored in glucose for life processes. Aerobic respiration occurs in the presence of oxygen, whilst anaerobic respiration occurs without it.
Which of the following statements is true of the process of respiration in animals and plants?
In plants, the reactants are carbon dioxide and water
When a molecule of glucose is oxidised, much more energy is released in animals
The process is identical in animals and plants
Which of the following is the maximum efficiency of aerobic respiration?
10 to 20%
40 to 50%
90 to 100%
Which of the following is NOT a function of respiration?
The transport of substances in the xylem
To maintain a constant environment in cells
To transport molecules against concentration gradients
Which of the following is able to respire anaerobically?
Human heart muscle
A garden plant
Where does the process of anaerobic respiration occur?
In the cytoplasm of the cell
Which of the following statements is true about aerobic and anaerobic respiration?
Aerobic respiration produces much more energy per glucose molecule than anaerobic respiration
The products of anaerobic respiration contain less energy than the products of aerobic respiration
More species of organism obtain their energy anaerobically than aerobically.
Which of the following is produced when a plant respires anaerobically?
Starch and cellulose
Ethanol and carbon dioxide
Which of the following is the breakdown product of amino acids in humans?
Which of the following is true of an athlete after intense exercise?
Their body has increased its glycogen content
Their heart and breathing rate falls to normal straightaway
Lactic acid is taken to the liver in the blood
Which of the following best explains why yeast is used to make bread?
The alcohol produced by anaerobic respiration adds flavour to the bread
The carbon dioxide produced by anaerobic respiration makes the dough rise
Yeast respires anaerobically to produce lactic acid, which produces the sour dough needed to make bread