Question

fermentation and temperature graph
respirometers were set up that contained yeast and 2% glucose solution. each respirometer was placed at a different temperature. the height of the bubble contained in the respirometer was measured every 5 minutes for 20 minutes. the results can be seen in the graph below.
respirometer bubble height over time at different temperatures
which of the tested temperatures is optimum for yeast fermentation?
(click to select)
45 degrees celsius
15 degrees celsius
37 degrees celsius
0 degrees celsius

Explanation:

Step1: Analyze the graph

The graph shows the height of the respirometer bubble over time at different temperatures. A higher bubble height indicates more fermentation (as gas is produced during fermentation, pushing the bubble).

Step2: Compare the bubble heights

At 37 degrees Celsius, the bubble height is the highest among all the tested temperatures (0°C, 15°C, 45°C, 37°C) over most of the time intervals measured (e.g., at 5 minutes, 10 minutes, etc.). This implies that the rate of fermentation (which produces gas to move the bubble) is highest at 37°C.

Answer:

37 degrees Celsius