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

Choose the correct sentence.

$S$ - Statement: The presence of $Zn$ is essential for the activity of carbonic anhydrase.
$R$ - Reason: The presence of vanadium is essential for the activity of nitrogenase.

Which of the following elements is used up in phosphorylation?

The deficiencies of micronutrients not only affect the growth of plants but also vital functions,such as photosynthetic and mitochondrial electron flow. Among the list given below,which group of three elements shall affect most,both photosynthetic and mitochondrial electron transport?

Which of the following groups of elements are mobile?