______________ is formed by the reversible combination of carbon dioxide with haemoglobin.

Carboxyhaemoglobin

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Carbaminohaemoglobin

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Oxyhaemoglobin

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Bicarbonate ions

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Solution

The correct option is B Carbaminohaemoglobin
Carbaminohaemoglobin is formed by the reversible combination of carbon dioxide and haemoglobin. It is formed at the cellular level in the presence of low partial pressure of oxygen and low acidic haemoglobin. It dissociates at the lung level where conditions are opposite i.e. high partial pressure of oxygen.

Carboxyhaemoglobin results due to the binding of carbon monoxide with haemoglobin.

Oxyhaemoglobin is an unstable compound formed due to the binding of oxygen with haemoglobin.

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Similar questions

Q. ______________ is formed by the reversible combination of carbon dioxide with haemoglobin.

Q. Assertion :Carbon monoxide is a poisonous gas.
Reason: Carbon monoxide combines with haemoglobin to form carboxy-haemoglobin whch prevents absorption of oxygen by it.

Q. A compound ‘P’ is formed by the combination reaction of quick lime with water. This compound ‘P’ further reacts with carbon dioxide present in the air to form a substance ‘X’ after a certain period of time. Identify the compound ‘X’.

Match the following :

$\begin{matrix} Column A & Column B 1. A product of incomplete burning & (a) Hopcolite 2. Nature of carbon monoxide & (b) Combustible gas 3. A compound formed by the combination & (c) Carboxy-haemoglobin of haemoglobin and carbon monoxide 4. A mixture of metallic oxides & (d) Carbon monoxide 5. Carbon monoxide & (e)Highly poisonous \end{matrix}$

Q. Fill in the blanks with approriate words.
Most carbon dioxide is transported in blood in the form of .......... ions. Hydrogen ions formed when carbon dioxide enters blood become attached to .......... , so that the addition of carbon dioxide causes only a small decrease in blood pH.

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Transport of Carbon Dioxide

Standard XII Biology

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