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Question

Haemozoin is a ____.

A
toxin released from Plasmodium infected cells
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B
toxin released from Streptococcus infected cells
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C
precursor of hemoglobin
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D
toxin released from Haemophilus infected cells
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Solution

The correct option is (A) toxin released from Plasmodium-infected cells

Haemoglobin

Haemoglobin is a conjugated protein with heme as the prosthetic group.

The precursors of haemoglobin are the amino acids, porphyrin ring and iron.

Streptococcus

Streptococcus produces various types of infections, like mild throat infections and even pneumonia. Exotoxins released by Streptococcus pyogenes are responsible for the rash.

Plasmodium-infected cells

Plasmodium, the malarial parasite, has two hosts, humans and female Anopheles mosquitoes.

The rupturing of the RBCs during the life cycle of the parasite in man is associated with the release of toxins calledhemozoin. The release of the toxins causes recurrent fevers and chills.

Haemophilus

Haemophilus bacteria cause various types of infections like meningitis, pneumonia etc. It does not produce hemozoin.

Final answer: (A) toxin released from Plasmodium-infected cells

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