Respiration (Cambridge (CIE) IGCSE Biology)

Which row in the table below shows the correct products produced by anaerobic respiration in yeast and in animals?

Extended only

During vigorous exercise, such as cycling uphill, lactic acid builds up in the muscles.

How is this lactic acid removed during recovery?

Why does anaerobic respiration of glucose release less energy in muscle cells than aerobic respiration?

1. Energy is lost in oxygen.

2. Energy remains trapped in the chemical bonds in the molecule lactic acid.

3. Energy remains trapped in the chemical bonds in the molecule ethanol.

4. Energy is lost in carbon dioxide.

The diagram below shows an experimental set-up which can be used to investigate gas exchange in a plant leaf.

In which direction would the ink drop move and for what reason?

The graph below shows the results of an investigation into how the rate of respiration of an organism is affected by changing the temperature.

Which of the following statements would explain the difference between the rate of respiration at 10 °C and that at 30 °C?

The diagram below shows an experiment set up by a group of students to investigate respiration in yeast.

Which row of the table below correctly describes the contents of the flask after 20 hours?

The diagram below shows an experiment set up by a teacher to demonstrate how an investigation into anaerobic respiration in yeast cells can be carried out.

Predict what would happen to the coloured liquid in the glass tube. 

Extended only

Four metabolic reactions that can occur in living organisms are shown below:

1. C₆H₁₂O₆ + 6O₂ → 6CO₂+ 6H₂O

2. glucose → lactic acid

3. 6CO₂+ 6H₂O → C₆H₁₂O₆ + 6O₂

4. C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

Which of the above reactions take place in yeast cells to release energy?

Which of the following processes would release the most energy in a cell from one molecule of glucose?

1. Aerobic respiration in yeast

2. Aerobic respiration in animals

3. Aerobic respiration in plants

In which conditions would the cells of a dicotyledonous green plant respire?

Extended only

Which of the following is the correct balanced symbol equation for aerobic respiration in yeast cells?

The list below shows four metabolic processes that can occur in living cells.

1. carbon dioxide + water →  glucose + oxygen

2. glucose → lactic acid

3. glucose + oxygen →  carbon dioxide + water

4. glucose →  alcohol + carbon dioxide

Which row of the table correctly represents the processes that can occur in muscle cells and yeast cells.