C3, C4 & CAM Plants
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21 Terms
What is carbon first incorporated into in C3 plants?
A 3-carbon compound
What is carbon first incorporated into in C4 plants?
A 4-carbon compound
Which plant type would have stomata open during the day?
C3 & C4 plants
In C3 plants, what enzyme is involved in the uptake of CO2?
RUBISCO
Where does photosynthesis take place in C3 plants?
Throught the leaf
True or false: Most plants are C4 plants
False.
In C4 Plants, what enzyme is involved in the uptake of CO2?
PEP Carboxylase
After PEP Carboxylase takes in the CO2, what happens?
The CO2 is delivered directly to RUBISCO
Examples of C3 Plants
Most plants
Examples of C4 plants
Corn, summer annual plants
Why is C4 photosynthesis good for high light intensity and high temperatures?
1. CO2 is delivered directly to RUBISCO, not allowing it to grab oxygen and undergo photorespiration.
2. Has better Water Use Efficiency because PEP Carboxylase brings in CO2 faster and so does not need to keep stomata open as much (less water lost by transpiration) for the same amount of CO2 gain for photosynthesis.
What does CAM stand for?
Crassulacean Acid Metabolism
In CAM plants, in what form would you find CO2 prior to photosynthesis?
As an acid
When are the stomata open in a CAM plant?
At night
During the night, what happens to the CO2 in a CAM plant?
It is converted into an acid and stored
What happens to the acid stored during the night in CAM plants?
It is broken down and released to RUBISCO to be used during photosynthesis
In which plant family was CAM photosynthesis first found?
Crassulaceae
In what type of conditions would you find a CAM plant?
Arid
What is CAM-idle?
When conditions are extremely arid, a CAM plant can keep its stomata closed night and day.Oxygen given off in photosynthesis is used for respiration and CO2 given off in respiration is used for photosynthesis. The plant cannot CAM-idle forever.
What is a benefit of CAM-idling?
A plant can survive dry spells and recover very quickly when water is available again
Examples of CAM plants
Succulents, agaves, orchids, bromeliads
Note 
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