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 what is hemoglobin?

hemoglobin is a  respiratory protein found in the red blood cells (erythrocytes) of all vertebrates and some invertebrates. A hemoglobin molecule is composed of a protein group, known as globin, and four heme groups, each associated with an iron atom.

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 hemoglobin in a type of cell present in red blood cell which make blood red

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Dear Student,

@ Sarah and nayanashree: please refer to the correct answer provided by Kwak.

@ Kwak: Good effort! Your answers are really helpful to all the users of this community. Keep writing!!! You deserve a from us.

Best wishes !!

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 hemoglobin is a substance which brings red colour to the blood

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hemoglobin is a pigment used to make the bloods colour red

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thanks. It means  a lot coming from you.

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