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 regeneration phase of the Calvin cycle requires ATP. What is the primary role of ATP in this phase?
Reduction of 3-PGA to G3P
Phosphorylation of intermediates to convert them back to RuBP
Fixation of CO2 to RuBP
Regeneration of NADPH
Which of the following is NOT a direct product of the light-dependent reactions of photosynthesis?
ATP
NADPH
O2
Glucose
What is the main product of the light-dependent reactions that is directly used in the Calvin cycle?
ATP and NADPH
Glucose
Carbon dioxide
Water
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 are the main products of the light-dependent reactions that are used in the Calvin cycle?
ADP and NADP+
ATP and NADPH
Glucose and oxygen
Water and carbon dioxide
Which of the following statements is INCORRECT concerning the energy release during ATP synthesis via chemiosmosis?
The proton gradient across the inner mitochondrial membrane drives ATP synthesis.
ATP synthase utilizes the energy stored in the proton gradient to phosphorylate ADP.
Oxygen acts as the final electron acceptor in the electron transport chain, contributing to the proton gradient.
ATP hydrolysis releases energy during chemiosmosis.
The enzyme directly responsible for synthesizing ATP during chemiosmosis is:
NADH dehydrogenase
Cytochrome oxidase
ATP synthase
ATPase
Which of the following BEST describes the relationship between the electron transport chain and ATP synthesis during chemiosmosis?
The electron transport chain creates a proton gradient that drives ATP synthesis
ATP synthesis provides the energy for the electron transport chain
The electron transport chain and ATP synthesis are independent processes
ATP synthase creates a proton gradient that drives the electron transport chain
Which of the following is essential for chemiosmosis to occur?
A proton gradient across a membrane
An electron transport chain
ATP synthase
ADP
The energy source that directly drives ATP synthesis during chemiosmosis is:
The electron transport chain
The potential energy stored in a proton gradient
ATP synthase
ADP
