Q1.Enzyme involved in nitrogen assimilation
(a) nitrogenase
(b) nitrate reductase
(c) transferase
(d) transaminase
Q2.Passive absorption of minerals depend on
(a) temperature
(b) temperature and metabolic inhibitor
(c) metabolic inhibitor
(d) humidity
Q3.Boron in green plants assists in
(a) sugar transport
(b) activation of enzymes
(c) acting as enzyme cofactor
(d) photosynthesis
Q4.Grey spots of oat are caused by deficiency of
(a) Fe
(b) Cu
(c) Zn
(d) Mn
Q5.The association between blue-green algae and fungi occurs in
(a) lichens
(b) symbiosis
(c) cannibism
(d) mycorrhiza
Q6.Which one of the following mineral elements plays an important role in biological nitrogen fixation?
(a) Molybdenum
(b) Copper
(c) Manganese
(d) Zinc
Q7.A plant requires magnesium for
(a) protein synthesis
(b) chlorophyll synthesis
(c) cell wall development
(d) holding cells together.
Q8.Mycorrhiza is a symbiotic relationship between roots of higher plants and
(a) virus
(b) fungi
(c) bacteria
(d) blue green algae
Q9.Minerals absorbed by roots move to the leaf through
(a) xylem
(b) phloem
(c) sieve tubes
(d) none of the above
Q10.Which one of the following is not an essential element for plants?
(a) Potassium
(b) Iron
(c) Iodine
(d) Zinc
Solutions:
S1.Ans.(a)
S2.Ans.(a)
S3.Ans.(a)
S4.Ans.(d)
S5.Ans.(a)
S6.Ans.(a)
S7.Ans.(b)
S8.Ans.(b)
S9.Ans.(a)
S10.Ans.(c)
