Multiple Choice QuestionsA plant requires magnesium (Mg) for
Holding cells together
Protein synthesis
Chlorophyll synthesis
Cell wall development
The enzyme responsible for atmospheric nitrogen fixation is
nitrogenase
hydrogenase
oxygenase
carboxylase
A.
nitrogenase
Enzyme nitrogenase plays a key role in N, fixations and remains active only during anaerobic condition. It is made up of two protein subunits :
i) non-heme iron protein or Fe-protein or dinitrogen reductase.
ii) Iron molybdenum protein or Mo-Fe protein or dinitrogenase
Insects captured by insectivorous plants fulfil their requirements of
enzymes
oxygen
nitrogen
water
The deficiencies of micro-nutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport ?
Cu, Mn, Fe
Co, Ni, Mo
Mn, Co, Ca
Ca, K, Na
The non- photosynthetic, non- symbiotic N2 fixing bacteria are
Rhodobacter
Spirillum
Azotobacter
All of these
Switch
