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.
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
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
The primary function of the dark phase of photosynthesis is to:
Release oxygen
Generate ATP and NADPH
Fix carbon dioxide into organic molecules
Split water molecules
How many molecules of CO2 are required to produce one molecule of glucose (C6H12O6) in the Calvin cycle?
1
3
6
12
The first stable product formed after CO2 fixation in the C3 cycle is:
RuBP
3-PGA
G3P
Glucose
