Plant Physiology - Mineral Nutrition
Q. Calcium is important for which of the following processes in plants? (2020)
A.
Nutrient transport
B.
Cell division
C.
Photosynthesis
D.
Respiration
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Solution
Calcium is vital for cell division and is a key component of cell walls, providing structural stability.
Correct Answer: B — Cell division
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Q. Calcium is primarily involved in which of the following processes? (2020)
A.
Photosynthesis
B.
Cell wall stability
C.
Nutrient transport
D.
Respiration
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Solution
Calcium is crucial for maintaining cell wall stability and structure in plants.
Correct Answer: B — Cell wall stability
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Q. Deficiency of which nutrient causes chlorosis in plants? (2022)
A.
Nitrogen
B.
Phosphorus
C.
Potassium
D.
Calcium
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Solution
Nitrogen deficiency leads to chlorosis, which is the yellowing of leaves due to insufficient chlorophyll production.
Correct Answer: A — Nitrogen
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Q. Iron deficiency in plants typically leads to which of the following symptoms? (2022)
A.
Stunted growth
B.
Leaf curling
C.
Interveinal chlorosis
D.
Wilting
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Solution
Iron deficiency causes interveinal chlorosis, where the areas between the veins of leaves turn yellow.
Correct Answer: C — Interveinal chlorosis
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Q. Iron is essential for which of the following functions in plants? (2022)
A.
Chlorophyll synthesis
B.
Water uptake
C.
Nutrient transport
D.
Cell elongation
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Solution
Iron is crucial for chlorophyll synthesis and is involved in various enzymatic reactions in plants.
Correct Answer: A — Chlorophyll synthesis
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Q. What is the effect of magnesium deficiency in plants? (2022)
A.
Stunted growth
B.
Leaf curling
C.
Chlorosis
D.
Wilting
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Solution
Magnesium deficiency leads to chlorosis, particularly in older leaves, as it is a key component of chlorophyll.
Correct Answer: C — Chlorosis
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Q. What is the function of phosphorus in plants? (2021)
A.
Energy transfer
B.
Water absorption
C.
Cell wall formation
D.
Photosynthesis
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Solution
Phosphorus is crucial for energy transfer in plants, particularly in the form of ATP (adenosine triphosphate).
Correct Answer: A — Energy transfer
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Q. What is the primary function of potassium in plants? (2020)
A.
Photosynthesis
B.
Water regulation
C.
Protein synthesis
D.
Cell division
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Solution
Potassium plays a crucial role in regulating water balance and osmotic pressure in plant cells.
Correct Answer: B — Water regulation
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Q. What is the primary role of potassium in plants? (2020)
A.
Photosynthesis
B.
Water regulation
C.
Protein synthesis
D.
Cell division
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Solution
Potassium plays a crucial role in water regulation and osmotic balance in plants, helping to maintain turgor pressure.
Correct Answer: B — Water regulation
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Q. What is the role of sulfur in plants? (2023)
A.
Protein synthesis
B.
Photosynthesis
C.
Water uptake
D.
Cell division
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Solution
Sulfur is essential for the synthesis of amino acids and proteins, playing a critical role in plant metabolism.
Correct Answer: A — Protein synthesis
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Q. What role does phosphorus play in plants? (2021)
A.
Energy transfer
B.
Water absorption
C.
Cell wall formation
D.
Photosynthesis
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Solution
Phosphorus is vital for energy transfer through ATP and is also important for nucleic acid synthesis.
Correct Answer: A — Energy transfer
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Q. Which mineral is primarily involved in the formation of chlorophyll? (2019)
A.
Magnesium
B.
Calcium
C.
Phosphorus
D.
Sulfur
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Solution
Magnesium is a central component of the chlorophyll molecule, essential for photosynthesis.
Correct Answer: A — Magnesium
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Q. Which mineral is primarily involved in the synthesis of chlorophyll? (2019)
A.
Magnesium
B.
Calcium
C.
Phosphorus
D.
Iron
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Solution
Magnesium is a central component of the chlorophyll molecule, which is essential for photosynthesis.
Correct Answer: A — Magnesium
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Q. Which nutrient is crucial for energy transfer in plants? (2020)
A.
Phosphorus
B.
Iron
C.
Zinc
D.
Copper
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Solution
Phosphorus is vital for energy transfer as it is a component of ATP, the energy currency of the cell.
Correct Answer: A — Phosphorus
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Q. Which nutrient is essential for the synthesis of amino acids? (2019)
A.
Sulfur
B.
Iron
C.
Zinc
D.
Copper
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Solution
Sulfur is essential for the synthesis of amino acids, particularly cysteine and methionine.
Correct Answer: A — Sulfur
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Q. Which nutrient is primarily responsible for root development? (2019)
A.
Nitrogen
B.
Phosphorus
C.
Potassium
D.
Magnesium
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Solution
Phosphorus is essential for root development and is involved in energy transfer and storage.
Correct Answer: B — Phosphorus
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Q. Which of the following elements is considered a micronutrient? (2023)
A.
Calcium
B.
Magnesium
C.
Iron
D.
Nitrogen
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Solution
Iron is classified as a micronutrient, required in smaller amounts compared to macronutrients.
Correct Answer: C — Iron
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Q. Which of the following is a macronutrient essential for plant growth? (2021)
A.
Iron
B.
Zinc
C.
Nitrogen
D.
Copper
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Solution
Nitrogen is a macronutrient that is essential for the synthesis of amino acids and nucleic acids in plants.
Correct Answer: C — Nitrogen
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Q. Which of the following is a sign of potassium deficiency in plants? (2023)
A.
Stunted growth
B.
Leaf curling
C.
Chlorosis
D.
Necrosis
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Solution
Potassium deficiency often results in leaf curling and marginal leaf scorch, indicating poor water regulation.
Correct Answer: B — Leaf curling
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Q. Which of the following is NOT a function of iron in plants? (2022)
A.
Chlorophyll synthesis
B.
Electron transport
C.
Cell wall formation
D.
Enzyme activation
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Solution
Iron is not directly involved in cell wall formation; it primarily functions in chlorophyll synthesis and electron transport.
Correct Answer: C — Cell wall formation
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Q. Which of the following is NOT a function of magnesium in plants? (2023)
A.
Chlorophyll formation
B.
Enzyme activation
C.
Water transport
D.
Nutrient uptake
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Solution
Magnesium is not directly involved in water transport; it primarily aids in chlorophyll formation and enzyme activation.
Correct Answer: C — Water transport
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Q. Which of the following is NOT a function of nitrogen in plants? (2023)
A.
Protein synthesis
B.
Photosynthesis
C.
Nucleic acid formation
D.
Chlorophyll production
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Solution
While nitrogen is essential for protein synthesis, nucleic acids, and chlorophyll production, it does not directly participate in the photosynthesis process.
Correct Answer: B — Photosynthesis
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