CBSE
Multiple Choice QuestionsAssertion : Plants absorb sulphur in the form of sulphate ions.
Reason : Sulphur bacteria are required for the formation of sulphate.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
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
In the given diagram A and B represent
| A | B |
| Mineralisation | Demineralisation |
| A | B |
| Ammonification | Denitrification |
| A | B |
| Denitrification | Ammonification |
| A | B |
| Denitrification | Mineralisation |
Which of the following sugars is not plants?
sucrose
glucose
lactose
fructose
Which one of the following is not a microelement for plants?
Cu
B
Zn
Cr
Which among the following is a rootless plant?
Nymphaea
Sagittaria
Ceratophyllum
Vallisneria
Hydroponics is
nutrient less culture
water less culture
soilless culture
none of these
Animals take phosphorus from
water
plants
rock
soil
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
