Under conditions of high temperature and light intensity, why do C4 plants show higher photosynthetic rates compared to C3 plants?
C4 plants have a higher affinity for CO2 than C3 plants.
C4 plants open their stomata more frequently than C3 plants.
C4 plants can utilize a wider range of light wavelengths compared to C3 plants.
Spatial separation of initial CO2 fixation and the Calvin cycle minimizes photorespiration.
Related Questions
In which cell type does the Calvin cycle occur in C4 plants?
Bundle sheath cells
Mesophyll cells
Epidermal cells
Guard cells
Which of the following is NOT a characteristic of C4 plants?
High CO2 compensation point
Kranz anatomy
Presence of PEP carboxylase
Dimorphic chloroplasts
The first stable product of the C4 pathway is:
Oxaloacetate (OAA)
Pyruvate
3-phosphoglycerate (3-PGA)
Ribulose-1,5-bisphosphate (RuBP)
Photorespiration results in the loss of which molecule?
CO2
O2
H2O
ATP
During photorespiration, RuBisCO binds to which molecule instead of CO2?
Oxygen
Nitrogen
Hydrogen
Water
Which enzyme is responsible for the initial carboxylation in C4 plants?
PEP carboxylase
RuBisCO
Kinase
Dehydrogenase
The primary benefit of the C4 pathway is:
Minimizing photorespiration
Increasing water use efficiency
Enhancing light absorption
Reducing the need for RuBisCO
In photorespiration, RuBP is converted to:
PGA and phosphoglycolate
Two molecules of PGA
Two molecules of phosphoglycolate
PGA and oxaloacetate
Photorespiration is initiated by the enzyme RuBisCO's ability to also bind:
O2
CO2
N2
H2O
In C4 plants, the initial carboxylation reaction occurs in:
Mesophyll cells
Bundle sheath cells
Both mesophyll and bundle sheath cells
Neither mesophyll nor bundle sheath cells
