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.
The dark reaction of photosynthesis takes place in the:
Grana of the chloroplast
Thylakoid membrane
Inner mitochondrial membrane
Stroma of the chloroplast
Which of the following is NOT a product of the dark reaction?
Glucose
G3P
Oxygen
ADP
The enzyme responsible for the carboxylation of RuBP in the Calvin cycle is:
PEP carboxylase
RuBisCO
Hexokinase
Phosphofructokinase
How many molecules of are required to produce one molecule of glucose in the Calvin cycle?
3
6
12
24
During the light-dependent reactions, what is the primary role of photosystem II (PSII)?
To split water molecules and release electrons.
To fix carbon dioxide into organic molecules.
To generate ATP through cyclic photophosphorylation.
To produce NADPH by reducing NADP+.
Which of the following is the correct sequence of electron flow during the light-dependent reactions?
PSI → Electron transport chain → PSII → NADP+
PSII → Electron transport chain → PSI → NADP+
NADP+ → PSI → Electron transport chain → PSII
PSII → PSI → Electron transport chain → NADP+
What is the primary function of the proton gradient generated during the light-dependent reactions?
To split water molecules.
To reduce NADP+ to NADPH.
To drive ATP synthesis by ATP synthase.
To fix carbon dioxide.
What is the role of light in photophosphorylation?
Directly phosphorylates ADP to ATP.
Provides energy to excite electrons in chlorophyll.
Splits water molecules.
Fixes carbon dioxide.
