Q1) Nitrogen is an important constituent of … …
a) Polyphosphates
b) Carbohydrates
c) Proteins
d) Lipids
Answer
Ans.(c)
Q2) Match the column….
a) Aerobic 1. Frankia
b) Cyanobacteria 2.Azospirillum
c) Casuarina 3.Clostridium
d) Tropical grasses 4. Aulosira
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
Answer
Ans.(c)
Q3) Element required in least quantity is … …
a) Zn
b) Mn
c) Mo
d) Cl
Answer
Ans.(c)
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
Answer
Ans.(c)
Q5) Essential macronutrients are … …..
a) Manufactured during photosynthesis
b) Produced by growth hormoes
c) Absorbed from soil
d) Produced by enzymes
Answer
Ans.(c)
Q6) Gene responsible for nitrogen fixation is … …
a) Nif
b) Nitrogenase
c) Yeast alanine tRNA synthetase
d) RNA synthetase
Answer
Ans.(a)
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
Answer
Ans.(d)
Q8) Denitrification is carried out by ….
a) Nitrosomonas
b) Nitrosocccus
c) Nitrobacter
d) Pseudomonas
Answer
Ans.(d)
Q9) Plants absorb nitrogen as …
a) Nitrate
b) Nitrite
c) Ammonia and Urea
d) All the above
Answer
Ans.(d)
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
Answer
Ans.(d)
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
Answer
Ans.(a)
Q12) In the given diagram A and B represent …
b) Ammonification, Denitrification
c) Denitrification, Ammonification
d) Dentrification, Mineralisation
Answer
Ans.(c)
Q13) Element which is a component of proteinaceous materials and protoplasm is … …
a) Potassium
b) Nitrogen
c) Magnesium
d) Oxygen
Answer
Ans.(b)
Q14) Minerals are absorbed in the form of … …
a) Molecules
b) Ions
c) Compounds
d) Mixtures
Answer
Ans.(b)
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
Answer
Ans.(b)
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.
Answer
Ans.(c)
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
Answer
Ans.(b)
Q18) Nitrifying bacteria convert … ….
a) Nitrate to nitrogen
b) Ammonia to nitrogen
c) Nitrogen into soluble form
d) Ammonia to nitrate
Answer
Ans.(d)
Q19) The enzymes required for nitrogen fixation is …. …
a) Nitrogen deaminase
b) Nitrodioxidase
c) Amino acid decarboxylase
d) Nitrogenase
Answer
Ans.(d)
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
Answer
Ans.(a)
Q21) Inorganic nutrients are present in the soil as … …
a) Molecules
b) Atoms
c) Electrically charged ions
d) Colloids
Answer
Ans.(c)
Q22) Yield of Rice increaes by …. …
a) Sesbania
b) Anabaena
c) Bacillus subtilis
d) B. popillae
Answer
Ans.(b)
Q23) Which one is not a micronutrient? … …
a) Mo
b) B
c) Mg
d) Zn
Answer
Ans.(c)
Q24) Bacteria that convert ammonia to nitrite belong to … …
a) Nitrobacter
b) Nitrosomonas
c) Pseudomonas
d) Mycobacterium
Answer
Ans.(b)
Q25) Brown heart disease is due to deficiency of …
a) Iron
b) Boron
c) Potassium
d) Molybdenum
Answer
Ans.(b)
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.
Answer
Ans.(c)
Q27) Which of the following is macronutrient … …
a) Ca
b) Mo
c) Mn
d) Zn
Answer
Ans.(a)
Q28) Free living bacteria that can fix N2 in soil are … …
a) Azotobacter
b) Beijerinckia
c) Clostridium
d) All the above
Answer
Ans.(d)
Q29) Die back shoots is due to … …
a) Mn
b) Mo
c) B
d) Cu
Answer
Ans.(d)
Q30) Which one is essential for root growth? … …
a) Zn
b) Ca
c) Mo
d) S
Answer
Ans.(b)
Q31) Exanthema is a result of deficiency of …. …
a) Cu
b) Na
c) P
d) Na
Answer
Ans.(a)
Q32) A primary deficiency is caused by insufficient absorption of …. …..
a) Magnesium
b) Manganese
c) Calcium
d) Potassium
Answer
Ans.(d)
Q33) Chlorosis is caused by deficiency of … ….
a) Iron
b) Calcium
c) Copper
d) Boron
Answer
Ans.(a)
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
Answer
Ans.(b)
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
Answer
Ans.(c)
Q36) Azolla has a symbiotic relationship with … …
a) Chlorella
b) Anabaena
c) Nostoc
d) Tolypothrix
Answer
Ans.(b)
Q37) Sulphur is an important nutrient for optimum growth and productivity in …. ….
a) Oilseed crops
b) Pulse crops
c) Cereals
d) Fibre crops
Answer
Ans.(b)
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
Answer
Ans.(a)
Q39) Non-symbiotic nitrogen fixing prokaryote is … ….
a) Rhizobium
b) Nostoc
c) Frankia
d) Azobacter
Answer
Ans.(d)
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
Answer
Ans.(b)
Q41) Magnesium is an important component of … …
a) Haemoglobin
b) Florigen
c) Enzymes
d) Chlorophyll
Answer
Ans.(d)
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
Answer
Ans.(b)
Q43) Element which is a component of proteinaceous materials and protoplasm is … ….
a) Potassium
b) Nitrogen
c) Magnesium
d) Oxygen
Answer
Ans.(b)
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
Answer
Ans.(d)
Q45) Nitrogen fixing enzyme found in root nodules is … ….
a) Nitrogen estrase
b) Nitrogenase
c) Nitrase
d) Nitrosomonas
Answer
Ans.(b)
Q46) Boron assists in … ..
a) Activation of enzymes
b) Photosynthesis
c) Sugar transport
d) Acting as enzyme cofactor
Answer
Ans.(c)
Q47) Which of the following is a macronutrient …. ….
a) Mo
b) Mg
c) Mn
d) Zn
Answer
Ans.(b)
Q48) An immobile element in plants is … …
a) Calcium
b) Potassium
c) Phosphorus
d) Nitrogen
Answer
Ans.(a)
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
Answer
Ans.(c)
Q50) Micronutrients are …. ….
a) Mn, Ni, Zn
b) Mg, Mn, Mo
c) Cu, B, O
d) Ca, S, Fe
Answer
Ans.(a)
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