Multiple Choice QuestionsThe function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is to
convert atmospheric N2 to NH3
convert ammonia to nitrite
transport oxygen for activity of nitrogenase
protect nitrogenase from oxygen
Insects captured by insectivorous plants fulfil their requirements of
enzymes
oxygen
nitrogen
water
The enzyme responsible for atmospheric nitrogen fixation is
nitrogenase
hydrogenase
oxygenase
carboxylase
Which of the following is correct set of micronutrient for plants?
Mg, Si, Fe, Cu, Ca
Cu, Fe, Zn, B, Mn
Mg, Fe, Zn, B, Mn
Mo, Zn, Cl, Mg, Ca
Leghaemoglobin helps in
imparting colour to floral petals
protecting nitrogenase from O2
destroying bacteria
transport of food in plants
Which one of the following elements is not an essential micronutrient for plant growth?
Mn
Zn
Cu
Cu
Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?
Thiamine
Folic acid and cobalamine
Riboflavin
Riboflavin
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
A.
Cu, Mn, Fe
Micronutrients are minerals obtained from the soil and present in plant tissues at concentrations usually less than 3 mol g-1 dry matter. Copper (Cu), Manganese (Mn) and Iron (Fe) are the micronutrients which affect both photosynthesis and mitochondrial electron transport as they are the main constituents of various electron carriers.
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