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Which of the biomolecules below includes a polydentate ligand called a porphyrin? hemoglobin chlorophyll cytochrome c carbonic anhydrase?

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The correct answer is haemoglobin.
Porphyrins are a group of heterocyclic macrocycle organic compounds with the function to absorb strongly in the visible region of the electromagnetic spectrum. Those molecules are composed of four modified pyrrole subunits connected with carbon atoms. Porphyrins are the conjugate acids of ligands. They bind metals, like iron to form complex- heme which is the component of haemoglobin.
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The biomolecule from the given option that includes a polydentate ligand named Porphyrin is called Hemoglobin.

What is Porphyrin?

A porphyrin is a molecule with large rings made up of four pyrroles, which are smaller rings composed of four carbons and one nitrogen. These pyrrole molecules are linked together by a sequence of single-double bonds, forming a large ring known as tetrapyrrole.

Porphyrins are responsible for the red hue color of blood in mammals. These porphyrin molecules are used in the formation of -heme groups in mammals.

The nitrogen molecules in the ring's core have the ability to house an iron molecule that is responsible for the red color of blood called Hemoglobin.

Learn more about porphyrin here:

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