Multiple Choice QuestionsWhich one of the following elements is not an essential micronutrient for plant growth?
Mn
Zn
Cu
Cu
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
Hydroponics is
nutrient less culture
water less culture
soilless culture
none of these
C.
soilless culture
Hydroponics is a subset of hydroculture, which is a method of growing plants without soil by using mineral nutrient solutions in a water solvent. It is useful in areas having thin, infertile and dry soils. They conserve water. It can regulate pH optimum for a particular crop, control soil borne pathogens, avoid problems of weeding and obtain consistently better yield.
The 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
Leghaemoglobin helps in
imparting colour to floral petals
protecting nitrogenase from O2
destroying bacteria
transport of food in plants
Insects captured by insectivorous plants fulfil their requirements of
enzymes
oxygen
nitrogen
water
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
The enzyme responsible for atmospheric nitrogen fixation is
nitrogenase
hydrogenase
oxygenase
carboxylase
Switch
