Question

Iron : Catalase :: Manganese ?​

Answer 1

iron : catalase : : Mn : photolysis of water

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Answer 2

Iron : Catalase :: Manganese : Arginase

• The relation between two sets of words needs to be derived first.

As we see, for the first set of words:

Iron and catalase are related as catalase is an enzyme that contains four heme groups( having iron).

Here, iron is essentially for the activity of the enzyme.

• Therefore, for the second case, we need an enzyme that contains manganese or requires manganese for its activity.

Manganese is an integral component of many enzymes such as arginase, pyruvate carboxylase, etc.

We choose arginase which is a manganese containing enzyme.