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Question
Which one of the following mineral elements plays an important role in biological nitrogen fixation?
Which one of the following mineral elements plays an important role in biological nitrogen fixation?
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Solution
The correct option is D Molybdenum
Plants do not use atmospheric nitrogen directly. They absorb fixed nitrogen, i.e., nitrogen in the form of compounds like nitrate, nitrite and ammonium ions. Molybdenum has an important role to play in the metabolism of nitrogen. It affects the synthesis of ascorbic acid. It activates the enzymes involved in nitrogen metabolism. Deficiency symptoms of molybdenum are
i. It leads to mottling and wilting of leaves at the margins, causing yellow spot disease of citrus.
ii. Whiptail disease in cauliflowers causing narrowing of leaf blades and their rugged appearance due to distortion.
Plants do not use atmospheric nitrogen directly. They absorb fixed nitrogen, i.e., nitrogen in the form of compounds like nitrate, nitrite and ammonium ions. Molybdenum has an important role to play in the metabolism of nitrogen. It affects the synthesis of ascorbic acid. It activates the enzymes involved in nitrogen metabolism. Deficiency symptoms of molybdenum are
i. It leads to mottling and wilting of leaves at the margins, causing yellow spot disease of citrus.
ii. Whiptail disease in cauliflowers causing narrowing of leaf blades and their rugged appearance due to distortion.
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