Q1) Nitrogen is an important constituent of … …
a) Polyphosphates
b) Carbohydrates
c) Proteins
d) Lipids

Q2) Match the column….

a) a – 4, b – 3, c – 2, d – 1
b) a – 5, b – 3, c – 4, d – 1
c) a – 5, b – 4, c – 1, d – 2
d) a – 3, b – 5, c – 4, d – 2

Q3) Element required in least quantity is … …
a) Zn
b) Mn
c) Mo
d) Cl

Q4) Function of red pigment leghaemoglobin present in root nodules of legumnious plants is to regulate …
a) CO2 supply in cells
b) Mo supply to cells
c) O2 supply to cells
d) Production of phenolic compounds

Q5) Essential macronutrients are … …..
a) Manufactured during photosynthesis
b) Produced by growth hormoes
c) Absorbed from soil
d) Produced by enzymes

Q6) Gene responsible for nitrogen fixation is … …
a) Nif
b) Nitrogenase
c) Yeast alanine tRNA synthetase
d) RNA synthetase

Q7) An essential element is that which …

a) Is found in plant ash
b) Is availanle in soil
c) Improves health of plants
d) Is irreplaceable and indispensable for growth of plants

Q8) Denitrification is carried out by ….
a) Nitrosomonas
b) Nitrosocccus
c) Nitrobacter
d) Pseudomonas

Q9) Plants absorb nitrogen as …

a) Nitrate
b) Nitrite
c) Ammonia and Urea
d) All the above

Q10) Function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is to ….
a) Convert atmospheric nitrogen to ammonia
b) Convert ammonia to nitrite
c) Transport oxygen for activity of nitrogenase
d) Protect nitrogenase from oxygen

Q11) Active transport occurs … ….
a) Against concentration gradient and requires ATP
b) Against concentration gradient but does not require ATP
c) Along concentration gradient but requires ATP
d) Along concentration gradient but does not require ATP

Q12) In the given diagram A and B represent …

a) Mineralisation, Dmineralisation
b) Ammonification, Denitrification
c) Denitrification, Ammonification
d) Dentrification, Mineralisation

Q13) Element which is a component of proteinaceous materials and protoplasm is … …
a) Potassium
b) Nitrogen
c) Magnesium
d) Oxygen

Q14) Minerals are absorbed in the form of … …
a) Molecules
b) Ions
c) Compounds
d) Mixtures

Q15) Active and passive transports across cell membrane differ in … ….
a) Passive transport in non-selective
b) Passive transport is along the concentration gradient while active transport is due to metabolic energy
c) Active transport is more rapid
d) Passive transport is confined to anions while active transport in confined to cations

Q16) Assertion: Nitrogen fixing bacteria of legume root nodules survive in oxygen depleted cells.
Reason: Leghaemoglobin completely removes oxygen from nodule cells. …
a) If both the assertion and reason are true and reason explains the assertion.
b) If both the assertion and reason are true but reason does not explain the assertion
c) If assertion is true but reason is false
d) If assertion is false but reason is true.

Q17) Plant ash indicates … …..
a) Organic matter of plant
b) Mineral salt absorbed by plants
c) Both mineral salts nad organic matter
d) Silica absorbed by plants

Q18) Nitrifying bacteria convert … ….
a) Nitrate to nitrogen
b) Ammonia to nitrogen
c) Nitrogen into soluble form
d) Ammonia to nitrate

Q19) The enzymes required for nitrogen fixation is …. …
a) Nitrogen deaminase
b) Nitrodioxidase
c) Amino acid decarboxylase
d) Nitrogenase

Q20) Which group of three micronutrient elements affect both photosynthestic nad mitochondrial electron transport? … …
a) Cu, Mn, Fe
b) Co, Ni, Mo
c) Ca, K, Na
d) Mn, Co, Ca

Q21) Inorganic nutrients are present in the soil as … …
a) Molecules
b) Atoms
c) Electrically charged ions
d) Colloids

Q22) Yield of Rice increaes by …. …
a) Sesbania
b) Anabaena
c) Bacillus subtilis
d) B. popillae

Q23) Which one is not a micronutrient? … …
a) Mo
b) B
c) Mg
d) Zn

Q24) Bacteria that convert ammonia to nitrite belong to … …
a) Nitrobacter
b) Nitrosomonas
c) Pseudomonas
d) Mycobacterium

Q25) Brown heart disease is due to deficiency of …
a) Iron
b) Boron
c) Potassium
d) Molybdenum

Q26) Assertion: Deficiency of suphur causes chlorosis in plants
Reason: Sulphur is constituent of chlorophyll, proteins and nucleic acid … ….
a) If both the assertion and reason are true and reason explains the assertion.
b) If both the assertion and reason are true but reason does not explain the assertion
c) If assertion is true but reason is false
d) If assertion is false but reason is true.

Q27) Which of the following is macronutrient … …
a) Ca
b) Mo
c) Mn
d) Zn

Q28) Free living bacteria that can fix N2 in soil are … …
a) Azotobacter
b) Beijerinckia
c) Clostridium
d) All the above

Q29) Die back shoots is due to … …
a) Mn
b) Mo
c) B
d) Cu

Q30) Which one is essential for root growth? … …
a) Zn
b) Ca
c) Mo
d) S

Q31) Exanthema is a result of deficiency of …. …
a) Cu
b) Na
c) P
d) Na

Q32) A primary deficiency is caused by insufficient absorption of …. …..
a) Magnesium
b) Manganese
c) Calcium
d) Potassium

Q33) Chlorosis is caused by deficiency of … ….
a) Iron
b) Calcium
c) Copper
d) Boron

Q34) Assume that an actively respiring cell has 3X number of K+ in its cytoplasm and 2X number of K+ outside. After some time X number of K+enter the cell. What is the process by which K+ transport has taken place … …
a) Primary active transport
b) Secondary active transport
c) Passive transport
d) Diffusion

Q35) A crop plant which can grow in nitrogen deficient soils without external supply of it is … ….
a) Allium sativum
b) Gossypium herbaceum
c) Cajanus cajan
d) Helianthus annus

Q36) Azolla has a symbiotic relationship with … …
a) Chlorella
b) Anabaena
c) Nostoc
d) Tolypothrix

Q37) Sulphur is an important nutrient for optimum growth and productivity in …. ….
a) Oilseed crops
b) Pulse crops
c) Cereals
d) Fibre crops

Q38) One mineral activates enzyme catalase and other is constituent of chlorophyll. They are respectively …. …
a) Iron and Magnesium
b) Iron and Manganese
c) Magnesium amd Manganese
d) Calcium and Magnesium

Q39) Non-symbiotic nitrogen fixing prokaryote is … ….
a) Rhizobium
b) Nostoc
c) Frankia
d) Azobacter

Q40) Soil nitrate is more likely to leach than ammonium due to its …. ……
a) Small size
b) Negative charge
c) Being useless to soil flora
d) Abundance

Q41) Magnesium is an important component of … …
a) Haemoglobin
b) Florigen
c) Enzymes
d) Chlorophyll

Q42) Which is incorrect about ion channels … ….
a) They are proteins
b) All ions pass through same channel
c) Movement through them is simple diffusion
d) Movement through them is from high to low concentration

Q43) Element which is a component of proteinaceous materials and protoplasm is … ….
a) Potassium
b) Nitrogen
c) Magnesium
d) Oxygen

Q44) Micronutrients/trace elements are those that … ….
a) Can be removed from the plant without any effect on it
b) Play a minor role in plant nutrition
c) Form very small molecules in plants
d) Are present/required in small quantities in plants

Q45) Nitrogen fixing enzyme found in root nodules is … ….
a) Nitrogen estrase
b) Nitrogenase
c) Nitrase
d) Nitrosomonas

Q46) Boron assists in … ..
a) Activation of enzymes
b) Photosynthesis
c) Sugar transport
d) Acting as enzyme cofactor

Q47) Which of the following is a macronutrient …. ….
a) Mo
b) Mg
c) Mn
d) Zn

Q48) An immobile element in plants is … …
a) Calcium
b) Potassium
c) Phosphorus
d) Nitrogen

Q49) Which combination of micro and macronutrients is correct … …
a) Cu, Fe, K, P, ; B, Zn, Mo, N
b) Cu, K, P, B ; Fe, N, Mo, Ca
c) Cu, Zn, B, Mo; N, P, K, S
d) B, Fe, K, Zn ; P, K, Mn nad Mo

Q50) Micronutrients are …. ….
a) Mn, Ni, Zn                                      b) Mg, Mn, Mo
c) Cu, B, O                                           d) Ca, S, Fe

ANSWER KEY