Which of the following are trace elements?

  • A
    Boron and manganese
  • B
    Copper and zinc
  • C
    Chlorine and molybdenum
  • D
    All the above

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Which element is present in the structure of thiamine and biotin?

....... is present in nitrogenase and nitrate reductase,both of which participate in nitrogen metabolism.

Write the importance of $Zn^{2+}$ and $Cu^{2+}$ in plants.

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Which of the following enzymes requires copper for its activity?

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