CELL STRUCTURES AND FUNCTION
BIO MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an enzyme
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a hormone
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a lipid
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a sugar
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Detailed explanation-1: -An enzyme present in red blood cells, carbonic anhydrase, aids in the conversion of carbon dioxide to carbonic acid and bicarbonate ions. When red blood cells reach the lungs, the same enzyme helps to convert the bicarbonate ions back to carbon dioxide, which we breathe out.
Detailed explanation-2: -Carbonic anhydrase facilitates uptake of carbon dioxide by catalyzing the hydration of CO2 dissolved in blood to the more soluble bicarbonate ( HCO 3 − ).
Detailed explanation-3: -[2] Most of the carbon dioxide diffusing through the capillaries and ultimately into the red blood cells combines with water via a chemical reaction catalyzed by the enzyme carbonic anhydrase catalyzes, forming carbonic acid.
Detailed explanation-4: -carbonic acid is a weak acid that dissociates to form bicarbonate which is an anion and also a buffer. The decrease in the pH is balanced by the work of carbon dioxide, carbonic acid and carbonic anhydrase through the production of bicarbonate ion.