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.
Under conditions of high light intensity and limited CO2 availability, which process is most likely to be favored in chloroplasts?
Enhanced Calvin cycle activity
Increased non-cyclic photophosphorylation
Photorespiration
Increased synthesis of chlorophyll
The precise location of the oxygen-evolving complex (OEC) within the chloroplast is:
Stroma
Outer chloroplast membrane
Lumen side of the thylakoid membrane
Inner chloroplast membrane
Which of the following is NOT a direct product of the light-dependent reactions of photosynthesis?
ATP
NADPH
O2
Glucose
Which of the following factors does NOT directly influence the rate of photorespiration?
Light intensity
Oxygen concentration
Temperature
Carbon dioxide concentration
A plant is exposed to green light only. Which of the following is most likely to occur?
The rate of photosynthesis will be significantly reduced.
The rate of photosynthesis will be at its maximum.
The rate of photosynthesis will be slightly increased.
The rate of photosynthesis will remain unaffected.
How does an increase in atmospheric CO2 concentration initially affect the rate of photosynthesis, assuming other factors are optimal?
Increases the rate
Decreases the rate
Has no effect
Causes photorespiration
A plant is exposed to green light only. Which of the following is the most likely outcome regarding photosynthesis?
The rate of photosynthesis will be significantly reduced.
The rate of photosynthesis will be enhanced.
The rate of photosynthesis will proceed at a normal rate.
The plant will switch to utilizing green light efficiently.
Which of the following combinations of factors would most likely result in the highest rate of photosynthesis?
Low light intensity, low temperature, and low CO2 concentration
High light intensity, low temperature, and high CO2 concentration
High light intensity, optimal temperature, and high CO2 concentration
Low light intensity, high temperature, and low CO2 concentration
How does water stress primarily affect the rate of photosynthesis?
By directly inhibiting chlorophyll production
By increasing the rate of photorespiration
By reducing stomatal opening, limiting CO2 uptake
By denaturing the enzymes involved in the Calvin cycle
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+.
