Priya was still uncomfortable with the colour of blood. Bholu sensing this, asked his neighbor, the doctor, why Red Blood Cells (RBCs) have a red color.

Can you answer priya's question ?

RBCs contain the molecule hemoglobin that is mostly used to carry carbon dioxide.

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RBCs contain the molecule globin that is mostly used to carry protein nutrients.

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RBCs contain the molecule hemoglobin that is mostly used to carry protein nutrients.

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RBCs contain the molecule hemoglobin that is mostly used to carry oxygen.

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Solution

The correct option is D
RBCs contain the molecule hemoglobin that is mostly used to carry oxygen.

RBCs contain the pigment Hemoglobin. This pigment binds oxygen with itself and helps transport it to the rest of the body. Note that hemoglobin can also carry a little carbon dioxide but this is not its major function.

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