In a hypothetical experiment, a scientist genetically modifies a C4 plant to lack PEP carboxylase. Which of the following would be the MOST likely outcome under normal atmospheric conditions?
The plant would switch to CAM photosynthesis.
The plant would exhibit significantly reduced CO2 fixation and increased photorespiration.
CO2 fixation would remain unchanged, but the plant would require more water.
The plant would grow more efficiently due to reduced energy expenditure in the C4 pathway.
Related Questions
The first stable product of the C4 pathway is:
Oxaloacetate (OAA)
Pyruvate
3-phosphoglycerate (3-PGA)
Ribulose-1,5-bisphosphate (RuBP)
Kranz anatomy is typical of?
plants
plants
plants
Photorespiration
Cycle was first discovered in?
Saccharam
Sorghum
Maize
Finger millet
The process which makes major difference between and plants is
respiration
glycolysis
Calvin cycle
photorespiration
The ratio of oxygen consumed to CO2 released during photorespiration is:
1:1
1:2
2:1
3:1
A researcher is studying a C4 plant under controlled conditions. They suddenly increase the oxygen concentration in the environment while maintaining constant light and CO2 levels. Which of the following is the MOST likely immediate consequence?
A significant decrease in the rate of photosynthesis
A slight increase in photorespiration
A significant increase in the rate of photosynthesis
No change in the rate of photosynthesis or photorespiration
Which of the following is NOT a characteristic of C4 plants?
High CO2 compensation point
Kranz anatomy
Presence of PEP carboxylase
Dimorphic chloroplasts
carboxylase is associated with
C3 pathway
C4 and CAM pathways
Glycolysis
Krebs cycle
carboxylase is associated with
C3 pathway
C4 and CAM pathways
Glycolysis
Krebs cycle
A plant is exposed to an environment with high CO2 and low O2 concentrations. Which process would be MOST directly and significantly inhibited under these conditions?
Calvin cycle
Photorespiration
Electron transport chain
C4 cycle
