Photosynthesis & Limiting Factors

6CO_2 + 6H_2O \xrightarrow{\text{light}} C_6H_{12}O_6 + 6O_2

Rate5 bubbles/min

Limiting factorCO₂

Enzyme activity72%

Maximum possible60 bubbles/min

Light intensity50 %

CO₂ concentration0.04 %

Temperature25 °C

Get the pondweed bubbling at more than 10 per minute
Make LIGHT the limiting factor
With the light at full power, get above 40 bubbles/min — work out what is actually holding it back
Show that overheating destroys the rate: with plenty of light and CO₂, drive it below 10
Reach about 50 bubbles per minute