Multiple Choice QuestionsThe plant ash is an indication of :
organic matter of plant
waste product
mineral salts absorbed by plants
none of these
Hydroponics is
cultivation of plants in water
growth of plants towards water
growth of plants away from water
soil less cultivation of plants
When one element is involved in opening and closing of stomata, the other helps to maintain the ribosome structure. They are
Potassium and calcium
Phosphorus and sulphur
Potassium and magnesium
Iron and magnesium
Iron and magnesium
C.
Potassium and magnesium
Magnesium is absorbed by plants in the form of divalent Mg2+. It activates the enzymes of respiration, photosynthesis and are involved in the synthesis of DNA and RNA. It is a constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure.
Potassium is absorbed as potassium ion (K+). It helps to maintain an anion-cation balance in cells and is involved in protein synthesis, opening and closing of stomata,
activation of enzymes and in the maintenance of the turgidity of cells.
Which of the following groups of minerals are micronutrients?
Magnesium, Manganese, Copper, Boron and Phosphorus
Manganese, Copper, Magnesium, Zinc and Boron
Nitrogen, Potassium, Manganese, Copper and Iron
Iron, Manganese, Copper, Molybdenum and Zinc
Iron, Manganese, Copper, Molybdenum and Zinc
Match the mineral in Column I with the enzyme activated in
Column II and choose the correct option.
| Column I | Column II |
| (A) Magnesium | (1) Alcohol dehydrogenase |
| (B) Molybdenum | (2) Phosphoenolpyruvate carboxylase |
| (C) Zinc | (3) Nitrogenase |
A - 2; B - 3; C - 1
A - 1; B - 2; C - 3
A - 2; B - 1; C - 3
A - 3; B - 2; C - 1
A - 3; B - 2; C - 1
Free living nitrogen fixing aerobic bacterium is
Rhodospirillum
Anabaena
Nostoc
Beijernickia
Beijernickia
Match the Column I with that of Column II and choose the correct combination from the options given
| Column I- Essential elements | Column II- Deficiency causes |
| A. N, K, Mg, S, Fe, Mn, Zn, and Mo | 1. Inhibit cell division |
| B. N, K, S and Mo | 2. Necrosis |
| C. Ca, Mg, Cu and K | 3. Delay in flowering |
| D. N, S and Mo | 4. Chlorosis |
A - 4; B - 3; C - 2; D - 1
A - 1; B - 2; C - 3; D - 4
A - 4; B - 1; C - 2; D - 3
A - 2; B - 3; C - 4; D - 1
A - 2; B - 3; C - 4; D - 1
Which of the following is not a role played by potassium in plant growth?
Translocation of carbohydrates
Maintaining anion-cation balance
Opening and closing of stomata
Synthesis of protein
Synthesis of protein
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