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Nitrogen Cycle

Which one of ...

Question

Which one of the following has magnesium?

A

Vitamin

B_{12}

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B

Chlorophyll

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C

Haemocyanin

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D

Carbonic anhydrase

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Solution

The correct option is B Chlorophyll
Magnesium $(M g)$ is present in chlorophyll. It is the green colouring matter of leaves and green stems.
Vitamin $B_{12}$ contains cobalt. Haemocyanin contains copper. Carbonic anhydrase catalyzes the following reaction:
$C O_{2} + H_{2} O \to H_{2} C O_{3}$

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