Photorespiration Flashcards
What happens to the stomates during the day? Why?
They close during the day so they don’t lose water and open back up at night
What’s the fixation of photorespiration?
It has a fixation of O2 (instead of CO2 like photosynthesis does)
When does photorespiration occur?
On hot, dry, and bright days
What kind of molecules does photorespiration produce?
It produces 2–C molecules (instead of 3–C molecules like photosynthesis)
What doesn’t photorespiration produce?
It doesn’t produce sugar molecules or ATP
Which two types of plants have special adaptations to limit the negative affects of photorespiration?
C4 plants and CAM plants
What kind of environment do C4 plants live in and approximately what percentage of plants are C4 plants?
Give examples of C4 plants
C4 plants live in hot and moist environments. Approximately 15% plants are C4 plants, such as: grasses, corn, and sugar cane
Photorespiration occurs in two places in C4 plants, where are those two places?
The light reaction is in the mesophyll cells and the Calvin cycle is in the bundle sheath cells
Where can CAM plants be found? Approximately what percentage of plants on earth are CAM plants?
Give examples.
CAM plants can be found in hot, dry environments such as the desert. Approximately 5% of plants, including cacti and ice plants, are CAM plants
When does the light reaction happen in CAM plants?
During the day when the stomates are closed
In CAM plants, when does the Calvin cycle happen?
When CO2 is present
