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 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.
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
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
In a chloroplast, the reduction of carbon dioxide to form glucose during photosynthesis occurs in the:
Thylakoid lumen
Intermembrane space
Grana
Stroma
Factors affecting photosynthesis are
I. number and size of leaves
II. age and orientation of leaves
III. amount of chlorophyll
IV. amount of and
Select the correct option
I, II and IV
II, IV and V
IV, V and I
I, II, III and IV
Which of the following is concerned with carbon dioxide fixation?
Krebs cycle
Calvin cycle
Ornithine cycle
Glycolysis
How many molecules of glycine is required to release one molecule in photorespiration?
One
Two
Three
Four
