Q.1
Where do bacteroides occur .... [MPPMT 2010]
  • a) Leaves
  • b) Root nodules
  • c) Stem
  • d) Flower
Q.2
Plants growing in urea sprayed but Mg deficient soil will show ... .... [ CBSE 2000 ]
  • a) Deep green foliage
  • b) Early flowering
  • c) Yellowing leaves
  • d) Loss of pigmentation in petals
Q.3
Primary and secondary active transports, both ... ... [ WB. 2008]
  • a) Generated ATP
  • b) Use ATP
  • c) Can move solutes against their concentration gradients
  • d) Include passive movement of glucose molecule
Q.4
Microelement required for synthesis of IAA is also a cofactor for enzyme ... ... [ EAMCET 2002]
  • a) Nitrogenase
  • b) Catalase
  • c) PEP carboxylase
  • d) Carbonic anhydrase
Q.5
Necrosis of tissue, particularly leaf tissue is due to deficiency of .... ...[ DPMT 2011]
  • a) N, K, Mg, Fe, Mn, Zn, and Mo
  • b) Ca, Mg, Cu, S, Mo and K
  • c) N, K nad S
  • d) N, K, Mg and Fe
Q.6
Passage of minerals from top soil to subsoil through seepage of water is known as .... ... [ AIIMS 1990]
  • a) Leaching
  • b) Percolation
  • c) Conduction
  • d) transpiration
Q.7
Conversion of ammonia to nitrite by microbe is ... .... [ Wardha 2003]
  • a) Nitrification
  • b) Nitrogen fixation
  • c) Eutrophication
  • d) Denitrification
Q.8
Which is the role of molybdenum ... ..... [ JIPMER 2002]
  • a) Nitrogen fixation
  • b) Flower induction
  • c) Chromosome contraction
  • d) Carbon assimilation
Q.9
Leghaemoglobin functions as .... ... [ AFMC 2011]
  • a) Oxygen scavenger
  • b)Nitrogen scavenger
  • c) CO2 scavenger
  • d) Hydrogen carrier
Q.10
Yield of Rice is enhanced by ... ..... [ BHU 2006]
  • a) Azolla
  • b) Anabaena
  • c) Nostoc
  • d) Clostridium
Q.11
Simultaneous movement of two molecules across a membrane in the same direction is known as .... ...[ DPMT 2010]
  • a) Antiport
  • b) Uniport
  • c) Symport
  • d) Biport
Q.12
ATP molecules combine with carries molecules and allow passage of substances ... ... [ Pb. PMT 2000 ]
  • a) Along concentration gradient
  • b) Against concentration gradient
  • c) Both a and b
  • d) ATP is not required
Q.13
Magnesium is required for ... .....
  • a) DNA replication
  • b) RNA synthesis
  • c) Stomatal movements
  • d) Synthesis of chlorophyll
Q.14
Element essential for photolysis of water is .... .... [ MPPMT 1997]
  • a) Nitrogen
  • b) Oxygen
  • c) Chlorine
  • d) Carbon
Q.15
An element playing important role in nitrogen fixation is .... .... [ CBSE 2010]
  • a) Copper
  • b) Manganese
  • c) Zinc
  • d) Molybdenum
Q.16
Scientist credited with development of formula for balanced solution of mineral elements is ... .... [ MPPMT 1990]
  • a) Knop
  • b) Went
  • c) Hill
  • d) Emerson
Q.17
All the nitrogenase enzyme has been inactivated by radiation. there will be no .... .... [ CBSE 2004]
  • a) Fixation of atmospheric nitrogen
  • b) Fixation of nitrogen by legumes
  • c) Conversion of nitrate to nitrite in legumes
  • d) Conversion of ammonia to nitrate in soil
Q.18
What is required for nitrogen fixation by Rhizobium .... ... [ MHTCET 2011]
  • a) CO2
  • b) O2
  • c) Heterocyst
  • d) Potassium
Q.19
Match the columns .. ... [ kerala 2008]
a) Calcium Chlorotic veins
b) Potassium Delayed germination of seeds
c) Zinc Necrosis of young leaves
d) Iron Scorched leaf tip
e) Phosphorus Malformed leaves
  • a) a -3 , b - 1, c - 5, d - 2, e - 4
  • b) a - 1, b - 4, c - 5, d - 3, e - 2
  • c) a - 2, b - 3, c - 4, d - 1, e - 5
  • d) a - 3, b - 4, c - 5, d - 1, e - 2
Q.20
Which one helps in absorption of phosphorus from soil by plants ... .... [ CBSE 2011]
  • a) Frankia
  • b) Anabaena
  • c) Glomus
  • d) Rhizobium
Q.21
For its activity nitrogenase requires .... ... [ CBSE 2012]
  • a) High input of energy
  • b) Light
  • c) Mn2+
  • d) Super oxygen radicals
Q.22
Plant require Fe and Mg for ... ... [ JIPMER 1997]
  • a) Synthesis of chlorophyll
  • b) opening and closing of stomata
  • c) Energy transfer during photosynthesis and respiration
  • d) translocation of carbohydrate
Q.23
Component of nitrogenase and nitrate reductase is ... ... [ BHU 2012]
  • a) N
  • b) Mo
  • c) Co
  • d) No specific component
Q.24
Sink is related to ... ... [ MPPMT 1997]
  • a) Phytochrome
  • b) Enzymes
  • c) Stomata
  • d) Transport of minerals
Q.25
Which is a free living nitrogen fixing bacterium .... ... [ MPPMT 2012]
  • a) Pseudomonas
  • b) Azotobacter
  • c) Nitrosomonas
  • d) Rhizobium
Q.26
ions are absorbed by the plants through .... ... [ RPMT 1992]
  • a) Molecular diffusion
  • b) Carriers and pumps
  • c) Difference in water potential
  • d) Difference in D.P.D.
Q.27
Nitrogen is not a constituent of ... ...[ CBSE 2003]
  • a) Invertase
  • b) Pepsin
  • c) Bacteriochlorophyll
  • d) Idioblast
Q.28
Hydroponics is ... .... [ AIIMS 2001]
  • a) Growing of aquatic plants
  • b) Growing of floating aquatic plants
  • c) Soil-less cultivation of plants
  • d) Growing of plants inside water
Q.29
Mineral requirement is studied through hydroponics which is related to growing plants in ... .... [ AMU 2002]
  • a) Soil
  • b) Air
  • c) Solution
  • d) Ponds
Q.30
Chief sink of mineral elements is .... ..... [ RPMT 2011]
  • a) Bark
  • b) Ripe fruits
  • c) Senescent leaves
  • d) Lateral meristems
0 h : 0 m : 1 s