A plant exhibiting Kranz anatomy experiences a sudden drop in atmospheric CO2 levels. Which of the following is the MOST LIKELY immediate consequence on its photosynthetic efficiency?
Reduced initial fixation of CO2 by PEP carboxylase in mesophyll cells.
Increased oxygenation of RuBisCO in bundle sheath cells.
Immediate cessation of the Calvin cycle in bundle sheath cells.
Enhanced activity of photorespiration in mesophyll cells.
Related Questions
Leaf
Is a lateral generally flattened structure born on the stem
Is a vegetative organ for photosynthesis
Originates from shoot apical meristem
All of the above
A plant exhibiting Kranz anatomy experiences a sudden drop in atmospheric CO2 levels. Which of the following is the MOST LIKELY immediate consequence on its photosynthetic efficiency?
Reduced initial fixation of CO2 by PEP carboxylase in mesophyll cells.
Increased oxygenation of RuBisCO in bundle sheath cells.
Immediate cessation of the Calvin cycle in bundle sheath cells.
Enhanced activity of photorespiration in mesophyll cells.
Which tissue layer is responsible for the transport of organic materials synthesized in the leaf?
Xylem
Phloem
Palisade parenchyma
Spongy parenchyma
Which of the following is the primary function of a leaf?
Transpiration
Reproduction
Storage
Photosynthesis
In a CAM plant undergoing a prolonged drought, which physiological change would be MOST prominent in its leaves during the daytime?
Stomata open, and CO2 is directly fixed by RuBisCO.
Stomata remain closed, and malate is decarboxylated to release CO2.
Stomata partially open, and PEP carboxylase fixes atmospheric CO2.
Stomata remain closed, and the Calvin cycle ceases completely.
A mutation in a plant affects the development of its palisade parenchyma, significantly reducing the number and length of these cells. Which of the following would be the MOST DIRECT consequence of this mutation on photosynthesis?
Increased rate of photorespiration due to higher oxygen concentration.
Reduced CO2 fixation by RuBisCO in the mesophyll cells.
Decreased light absorption and reduced efficiency of the light-dependent reactions.
Impaired transport of sugars from the source to the sink.
The tissue in a leaf where most photosynthesis occurs is called:
Epidermis
Xylem
Phloem
Mesophyll
In a dorsiventral leaf, the location of the palisade parenchyma is:
Towards the adaxial surface
Towards the abaxial surface
Scattered throughout the mesophyll
Absent in dorsiventral leaves
