Prepare for NEET Biology Photosynthesis in Higher Plants with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert guidance to grasp light and dark reactions.
Which of the following metabolites is transported from mesophyll cells to bundle sheath cells in C4 plants during active photosynthesis?
3-Phosphoglycerate (3-PGA)
Glyceraldehyde 3-phosphate (G3P)
Pyruvate
Malate or aspartate
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.
In C4 plants, the initial fixation of CO2 occurs in mesophyll cells, forming a 4-carbon compound. This compound then travels to bundle sheath cells, where it releases CO2. What is the PRIMARY advantage of this spatial separation of CO2 fixation and the Calvin cycle?
Increases the efficiency of light absorption
Minimizes photorespiration by increasing CO2 concentration around RuBisCO
Reduces the need for water
Allows the plant to fix CO2 at night
The primary benefit of the C4 pathway is:
Minimizing photorespiration
Increasing water use efficiency
Enhancing light absorption
Reducing the need for RuBisCO
Which type of plants primarily utilize the C4 pathway?
Plants in hot, dry environments
Plants in cool, shaded environments
Aquatic plants
All plants
The first stable product of the C4 pathway is:
Oxaloacetate (OAA)
Pyruvate
3-phosphoglycerate (3-PGA)
Ribulose-1,5-bisphosphate (RuBP)
Which enzyme is responsible for the initial carboxylation in C4 plants?
PEP carboxylase
RuBisCO
Kinase
Dehydrogenase
In which cell type does the Calvin cycle occur in C4 plants?
Bundle sheath cells
Mesophyll cells
Epidermal cells
Guard cells
The first stable compound formed during carbon fixation differentiates and plants. In plants, this compound is:
3-PGA
Oxaloacetate
RuBP
Glucose
Given below are two statements:
Statement I: The primary acceptor in plants is phosphoenolpyruvate and is found in the mesophyll cells.
Statement II: Mesophyll cells of plants lack RuBisCo enzyme
In the light of the above statements, choose the correct answer from the options given below:
Both Statement I and Statement II are true and Statement II is the correct explanation of Statement I
Both Statement I and Statement II are true but Statement II is not the correct explanation of Statement I
Statement I is true but Statement II is false
Statement I is false but Statement II is true
