A mutation in a plant affects the enzyme responsible for converting glyceraldehyde-3-phosphate (G3P) to dihydroxyacetone phosphate (DHAP). Which of the following is the MOST likely direct consequence of this mutation on the Calvin cycle?
Complete cessation of the Calvin cycle
Accumulation of 3-PGA
Increased RuBisCO activity
Reduced export of triose phosphates from the chloroplast and impaired sucrose synthesis
Related Questions
In -plants, the first stable compound formed after carbon dioxide fixation is
Phosphoglyceraldehyde
Malic acid
Oxaloacetic acid
3-phosphoglycerate
Which of the following is NOT directly involved in the regeneration of RuBP during the dark phase of photosynthesis?
ATP
NADPH
ATP synthase
Several enzymes
Which of the following statements about factors affecting photosynthesis is INCORRECT?
Light intensity affects the rate of photosynthesis.
Carbon dioxide concentration influences the rate of photosynthesis.
Availability of water affects the rate of photosynthesis.
High temperature always promotes photosynthesis.
The turns of Calvin Cycle requires to form one glucose molecule
1
2
3
6
Every molecule entering the Calvin cycle needs
2 molecule of NADPH and 3 molecule of ATP for its fixation
2 molecule of NADPH and 2 molecule of ATP for its fixation
Variable amount of ATP
Only NADPH
PEPcase catalyse primary carboxylation step in
Maize
Wheat
Tomato
Potato
The regeneration phase of the Calvin cycle requires ATP. What is the primary role of ATP in this phase?
Reduction of 3-PGA to G3P
Phosphorylation of intermediates to convert them back to RuBP
Fixation of CO2 to RuBP
Regeneration of NADPH
If a plant is placed in an environment with very low carbon dioxide concentration, which aspect of photosynthesis would be MOST directly affected?
Light-dependent reactions
Water splitting
Carbon fixation in the Calvin cycle
Oxygen production
Chloroplast dimorphism is a characteristic feature of
Plants with Calvin cycle
plants
All plants
Only in algae
