2.2 Limiting Factors Flashcards
What is the average amount of carbon dioxide?
0.03%
What is the average temperature?
30*c
What happens to the enzymes above 40*c?
They denature, losing their shape of the active site so the substrates no longer fit so the enzyme no longer works
Why does a lack of light slow down the rate of photosynthesis?
Light provides the energy for photosynthesis to happen
Why does a lower temperature slow down the rate of photosynthesis?
The enzymes do not work effectively
Why does a lack of carbon dioxide slow down the rate of photosynthesis?
Carbon dioxide is needed as a reactant
Why do enzyme reactions slow down?
When the temp falls the enzymes work slower
What is a limiting factor?
Anything that puts a cap on the rate of photosynthesis
What is an independent variable?
The one being tested
What is a dependant variable?
The one you measure
Why is light a limiting factor?
It relies on the light energy to do photosynthesis
Why is carbon dioxide a limiting factor?
It is one of the reactants for photosynthesis
Explain the effect of increasing carbon dioxide on the rate of photosynthesis
The more carbon dioxide there is, the higher the rate of photosynthesis until the rate doesn’t increase any more and another factor is the limiting factor
Explain the effect of increasing light on the rate of photosynthesis
The more light there is, the higher the rate of photosynthesis until the rate doesn’t increase any more and another factor is the limiting factor
Explain the effect of increasing the temperature on the rate of photosynthesis
The higher the temperature, the higher the rate of photosynthesis until the temperature is above 40*c when the enzymes denature and the plant dies
