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 type of light converts the inactive form of phytochrome to its active form?
red light
far-red light
blue light
green light
Phytochrome plays a crucial role in:
photoperiodism
photosynthesis
respiration
transpiration
The oxygen released during photosynthesis originates from which molecule, and which two elements are directly involved in this process?
Carbon and Oxygen
Hydrogen and Carbon
Hydrogen and Oxygen
Manganese and Chlorine
During the light-dependent reactions of photosynthesis, water molecules are split. Which two elements are liberated from water in this process?
Carbon and Oxygen
Hydrogen and Oxygen
Magnesium and Oxygen
Phosphorus and Oxygen
In photosynthesis, oxygen is produced from the splitting of:
Carbon dioxide molecules
Water molecules
Glucose molecules
ATP molecules
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
What is the primary function of the bundle sheath cells surrounding the vascular bundles in plants?
Preventing photorespiration
Storage of water
Nitrogen fixation
Increasing light absorption
In plants, the high concentration of in the bundle sheath cells primarily serves to:
Increase ATP production during the Calvin cycle
Facilitate water storage within the leaf
Minimize photorespiration by suppressing RuBisCO's oxygenase activity
Enhance light absorption by the bundle sheath chloroplasts
