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.
Oxygen is produced during the light-dependent reactions. What is the source of this oxygen?
Water
Carbon dioxide
Glucose
Chlorophyll
Which photosystem is primarily involved in the splitting of water molecules?
Photosystem II
Photosystem I
Both Photosystem I and II
Neither Photosystem I nor II
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
In the Calvin cycle, the enzyme responsible for the carboxylation of RuBP is:
PEP carboxylase
RuBisCO
Hexokinase
Aldolase
Which of the following statements is INCORRECT regarding the Calvin cycle?
It occurs in the stroma of the chloroplast.
It uses ATP and NADPH produced during the light-dependent reactions.
It involves the fixation of carbon dioxide.
It directly requires light energy.
Which of the following factors does NOT directly affect the rate of photosynthesis?
Light intensity
Carbon dioxide concentration
Temperature
Soil pH
Increasing the concentration of carbon dioxide around a plant will MOST likely increase the rate of photosynthesis up to a certain point, because:
CO2 is a reactant in photosynthesis.
CO2 is a product of photosynthesis.
CO2 absorbs light energy.
CO2 regulates the opening and closing of stomata.
