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Q.1
Assertion: Deficiency of sulphur causes chlorosis in plants Reason: Sulphur is constituent of chlorophyll, proteins and nucleic acid ... .... [ AIIMS 2004]
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a) If both the assertion and reason are true and reason explains the assertion.
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b) If both the assertion and reason are true but reason does not explain the assertion
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c) If assertion is true but reason is false
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d) If assertion is false but reason is true.
Explanation
Answer : (c)
Q.2
Which of the following is macronutrient ... ... [ Har PMT 2007]
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a) Ca
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b) Mo
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c) Mn
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d) Zn
Explanation
Answer : (a)
Q.3
Free living bacteria that can fix N2 in soil are ... ... [ Odisha 2012]
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a) Azotobacter
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b) Beijerinckia
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c) Clostridium
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d) All the above
Explanation
Answer : (d)
Q.4
Die back shoots is due to ... ... [ kerala 2000 ]
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a) Mn
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b) Mo
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c) B
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d) Cu
Explanation
Answer : (d)
Q.5
Which one is essential for root growth? ... ... [ BHU 2004]
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a) Zn
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b) Ca
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c) Mo
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d) S
Explanation
Calcium is required for root growth Calcium, in the form of calcium pectate, is responsible for holding together the cell walls of plants. When calcium is deficient, new tissue such as root tips, young leaves, and shoot tips often exhibit distorted growth from improper cell wall formation. Calcium is also used in activating certain enzymes and to send signals that coordinate certain cellular activities. Answer : (b)
Q.6
Exanthema is a result of deficiency of .... ... { AMU 1997]
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a) Cu
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b) Na
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c) P
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d) Ca
Explanation
Answer : (a)
Q.7
A primary deficiency is caused by insufficient absorption of .... .....
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a) Magnesium
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b) Manganese
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c) Calcium
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d) Potassium
Explanation
Answer : (d)
Q.8
Chlorosis is caused by deficiency of ... .... [ MPPMT 1995]
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a) Iron
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b) Calcium
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c) Copper
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d) Boron
Explanation
Answer : (a)
Q.9
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 ... ... [ EAMCET 2009]
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a) Primary active transport
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b) Secondary active transport
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c) Passive transport
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d) Diffusion
Explanation
Active transport is to move substances against a concentration or electrochemical gradient, a cell must use energy. Here only one substrate i.e. K+ ion is transported and in one direction and direction of transportation is against electrochemical gradient, it is active transport and it requires uniporter. A uniporter is an integral membrane protein that transports a single type of substrate species (charged or uncharged) across a cell membrane. Transportation is relying only electrochemical potential difference and not on ATP. Secondary active transport is a form of active transport across a biological membrane in which a transporter protein couples the movement of an ion against a concentration/electrochemical gradient. Hence it is a secondary active transport. Answer : (b)
Q.10
A crop plant which can grow in nitrogen deficient soils without external supply of it is ... .... [ CPMT 1990]
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a) Allium sativum
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b) Gossypium herbaceum
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c) Cajanus cajan
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d) Helianthus annuus
Explanation
Answer : (c)
Q.11
Azolla has a symbiotic relationship with ... ... [ CBSE 2004]
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a) Chlorella
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b) Anabaena
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c) Nostoc
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d) Tolypothrix
Explanation
Answer : (b)
Q.12
Sulphur is an important nutrient for optimum growth and productivity in .... .... [ CBSE 2006]
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a) Oilseed crops
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b) Pulse crops
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c) Cereals
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d) Fibre crops
Explanation
Sulphur is constituent of certain amino acids. The amino acids form the protein by polymerisation. The pulses are rich in protein. Answer : (b)
Q.13
One mineral activates enzyme catalase and other is constituent of chlorophyll. They are respectively .... ...[ kerala 2012]
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a) Iron and Magnesium
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b) Iron and Manganese
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c) Magnesium and Manganese
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d) Calcium and Magnesium
Explanation
Answer : (a)
Q.14
Non-symbiotic nitrogen fixing prokaryote is ... .... [ DPMT 2009]
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a) Rhizobium
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b) Nostoc
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c) Frankia
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d) Azobacter
Explanation
Answer : (d)
Q.15
Soil nitrate is more likely to leach than ammonium due to its .... ......
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a) Small size
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b) Negative charge
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c) Being useless to soil flora
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d) Abundance
Explanation
Answer : (b)
Q.16
Magnesium is an important component of ... ... [ CBSE 2000 ]
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a) Haemoglobin
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b) Florigen
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c) Enzymes
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d) Chlorophyll
Explanation
Answer : (d)
Q.17
Which is incorrect about ion channels ... .... [ WB2008]
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a) They are proteins
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b) All ions pass through same channel
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c) Movement through them is simple diffusion
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d) Movement through them is from high to low concentration
Explanation
Ion channels are protein channels. Substances can move by simple diffusion directly along these cannels from high concentration to low concentration. Many of the protein channels are highly selective for transport of one or more specific ion. Answer : (b)
Q.18
Element which is a component of proteinaceous materials and protoplasm is ... ....[ AMU 1996]
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a) Potassium
0%
b) Nitrogen
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c) Magnesium
0%
d) Oxygen
Explanation
Answer : (b)
Q.19
Micronutrients/trace elements are those that ... ....
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a) Can be removed from the plant without any effect on it
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b) Play a minor role in plant nutrition
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c) Form very small molecules in plants
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d) Are present/required in small quantities in plants
Explanation
Answer : (d)
Q.20
Nitrogen fixing enzyme found in root nodules is ... .... [ CBSE 2001]
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a) Nitrogen esterase
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b) Nitrogenase
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c) Nitrase
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d) Nitrosomonas
Explanation
Answer : (b)
Q.21
Boron assists in ... .. [ CBSE 2003]
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a) Activation of enzymes
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b) Photosynthesis
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c) Sugar transport
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d) Acting as enzyme cofactor
Explanation
Answer : (c)
Q.22
Which of the following is a macronutrient .... .... [ RPMT 2000 ]
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a) Mo
0%
b) Mg
0%
c) Mn
0%
d) Zn
Explanation
Answer : (b)
Q.23
An immobile element in plants is ... ... [ CBSE 2011]
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a) Calcium
0%
b) Potassium
0%
c) Phosphorus
0%
d) Nitrogen
Explanation
Answer : (a)
Q.24
Which combination of micro and macronutrients is correct ... ... [ Odisha 2000 ]
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a) Cu, Fe, K, P, ; B, Zn, Mo, N
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b) Cu, K, P, B ; Fe, N, Mo, Ca
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c) Cu, Zn, B, Mo; N, P, K, S
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d) B, Fe, K, Zn ; P, K, Mn and Mo
Explanation
Answer : (c)
Q.25
Micronutrients are .... .... [ AMU 2012]
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a) Mn, Ni, Zn
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b) Mg, Mn, Mo
0%
c) Cu, B, O
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d) Ca, S, Fe
Explanation
Answer : (a)
Q.26
Bidirectional translocation of minerals takes place through ... .... [ CBSE 1997]
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a) parenchyma
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b) Cambium
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c) Xylem
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d) Phloem
Explanation
Answer : (d)
Q.27
Which is not caused by deficiency of mineral .... .... [ MPPMT 2007]
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a) Chlorosis
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b) Etiolation
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c) Necrosis
0%
d) Shortening of internodes
Explanation
Answer : (b)
Q.28
Culturing of plants in water/soil-less medium is ... ..... [ AIIMS 2000 ]
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a) Hydroponics
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b) Sand culture
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c) Aeroponics
0%
d) Soil-less culture
Explanation
Answer : (a)
Q.29
Internal cork of Apple/browning of Cauliflower is deficiency symptom of ... ... [ BHU 1997]
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a) Mo
0%
b) B
0%
c) Cu
0%
d) Zn
Explanation
Answer : (b)
Q.30
NPK denotes .... ... [ MPPMT 1990]
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a) Nitrogen, protein and kinetin
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b) Nitrogen, protein and potassium
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c) Nitrogen, potassium and kinetin
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d) Nitrogen, phosphorus and potassium
Explanation
Answer : (d)
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