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 enzyme in the Calvin cycle is directly responsible for incorporating CO2 into an organic molecule?
3-phosphoglycerate kinase
Glyceraldehyde 3-phosphate dehydrogenase
RuBisCO
Triose phosphate isomerase
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
Photorespiration is initiated by the enzyme RuBisCO's ability to also bind:
O2
CO2
N2
H2O
Which of the following is NOT a characteristic of C4 plants?
High CO2 compensation point
Kranz anatomy
Presence of PEP carboxylase
Dimorphic chloroplasts
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
Which organelle is involved in the salvage pathway of photorespiration?
Chloroplast
Mitochondrion
Peroxisome
Golgi apparatus
During photorespiration, RuBisCO binds to which molecule instead of CO2?
Oxygen
Nitrogen
Hydrogen
Water
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)
