Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?

Carboxypeptidase-A is an enzyme and contains zinc

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Haemoglobin is the red pigment of blood and contains iron

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Cyanocobalamin is

B^{12}

and contains cobalt

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Chlorophylls are green pigments in plants and contain calcium

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Solution

The correct option is D Chlorophylls are green pigments in plants and contain calcium
Chlorophylls are green pigments in plants and contain magnesium.
They are useful during photosynthesis to store energy in the form of glucose from carbon dioxide and water in presence of sunlight.

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