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Question

Select out the correct match regarding functional categories of essential elements.

A
Structural elements Mg, K, Fe
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B
Energy related elements C, H, O, N
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C
Enzyme activation elements Mo, Mg
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D
Osmotic regulation related element Mg, P
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Solution

The correct option is C Enzyme activation elements Mo, Mg
  1. Structural elements - Mg, K, Fe is incorrect match as carbon, hydrogen, oxygen and nitrogen are structural elements of cells.
  2. Energy related elements - C,H,O,N is incorrect match as components of energy-related chemical compounds in plants are magnesium in chlorophyll and phosphorous in ATP.
  3. Enzyme activation elements - Mo, Mg is correct match as Mo is an activator of nitrogenase during nitrogen metabolism and Mg2+ is an activator for both ribulose bisphosphate carboxylase oxygenase and phosphoenol pyruvate carboxylase in photosynthetic carbon fixation.
  4. Osmotic regulation related element - Mg, P is incorrect match as osmotic regulation related element is K because K is important in the opening and closing of stomata.

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