MCQ-3: Respiration

The diagram shows apparatus used to investigate anaerobic respiration in yeast.

What happens to the coloured liquid?

An experiment was done using the apparatus shown in the diagram.
The carbon dioxide content of the water in each tube was measured at the start and again three hours later.
In which tube would there be a decrease in carbon dioxide content?

After a race, athletes experience oxygen debt.
The diagram shows how the oxygen debt is removed.

What happens at X?

What is the equation for anaerobic respiration in yeast?

In an experiment to investigate anaerobic respiration, two bottles are set up in a warm room, as shown.

What would happen to each balloon after one day?

The graph shows the lactic acid concentration in blood during and after exercise.

The continuation of which process accounts for the shape of the graph at Z?

Vigorous exercise can cause an oxygen debt.
Which process removes the oxygen debt?

The diagram shows the apparatus at the beginning of an investigation into temperature change during the germination of seeds. The temperature at the start of the investigation was 25 °C in both flasks.
After two days the temperature in flask 1 is 25 °C. The temperature in flask 2 is 28 °C.

Which characteristic of living organisms is shown in this experiment?

What is produced by anaerobic respiration in mammals?

Glucose is required for respiration.
Which other molecule is required for aerobic respiration?

What is the correct equation for aerobic respiration?

Lactic acid builds up in the muscles during vigorous exercise.
During recovery, how is this lactic acid removed?

What is the effect on germinating seeds of increasing the temperature from 10 °C to 20 °C?

How do green plants and mammals obtain their energy?