Which of the following statement best summarizes about the macronutrient needs of prokaryotes?

• (a) Boron is required by some prokaryotic organisms in small quantity
• (b) manganese is required by some prokaryotic organisms in small quantity
• (C) Iron is required by some prokaryotic organisms in low quantity
• (D) Sulfur is needed in large quantities and essential component of some coenzymes and
  nutrients

Justification: Two major nutritional needs of the prokaryotic organisms are, (i) first carbon source for
building molecules within the cells, and second energy metabolism i.e. the source of energy for
growth. Micronutrients like Boron, manganese, and iron are required in small quantities by
prokaryotes to perform the cellular function for instance electron transport chain reactions, whereas
macronutrients like Sulphur requires in large quantities and necessary components of coenzymes.
Therefore option (d) summarizes better about macronutrients needs of prokaryotes than the above
three options.