The principle of limiting factors was proposed by:
Blackmann
Hill
Arnon
Liebig
Plants adapted to low light intensity have:
Larger photosynthetic unit size than the sun plants
Higher rate of CO2 fixation than the sun plants
More extended root system
Leaves modified to spines
During photorespiration, the oxygen consuming reaction (s) occur in:
Stroma of chloroplasts and peroxisomes
Grana of chloroplasts and peroxisomes
Stroma of chloroplasts
Stroma of chloroplasts and mitochondria
In the leaves of C4- plants, malic acid formation during CO2 fixation occurs in the cells of:
Mesophyll
Bundle sheath
Phloem
Epidermis
Photosystem-II occurs in:
Stroma
Cytochrome
Grana
Mitochondrial surface
Which one of the following statements about cytochrome P450 is wrong?
It contains iron.
It is an enzyme involved in oxidation reactions.
It is a coloured cell.
It has an important role in metabolism.
Boron in green plants assists in:
Sugar transport
Activation of enzymes
Acting as enzyme cofactor
Photosynthesis
A very efficient converter of solar energy with net productivity of 2 - 4 kg/m2 or more is the crop of :
Wheat
Sugarcane
Rice
Bajra
The substrate for photorespiration is :
Ribulose bis-phosphate
Glycolate
Serine
Glycine
Which of the following is a symbiotic nitrogen fixer?
Glomus
Azotobacter
Frankia
Azolla
