Question

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

Options

• Chlorophylls are green pigments in plants and contain calcium.

• Haemoglobin is the red pigment of blood and contains iron.

• Cyanidocobalamin is vitamin-B12 and contains cobalt.

• Carboxypeptidase-A is an enzyme and contains zinc.

Answer 1

Chlorophylls are green pigments in plants and contain calcium.

Explanation:

Chlorophylls are green pigments in plants, but they contain magnesium, not calcium, at the centre of the porphyrin ring. The other statements are correct.