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The enzyme that increases the reaction r...

The enzyme that increases the reaction rate between `CO_(2)` and `H_(2)O` in red blood cell is

A

carbonic anhydrase

B

adenylate cyclase

C

carbonic synthetase

D

alkaline phosphatase.

Text Solution

Verified by Experts

The correct Answer is:
A
About `70%` of `CO_(2)` os transported in plasma in the form bof bicarbonates, `CO_(2)` diffuses into RBCs, combines with water and form carbonic acid. Carbonic acid being unstable quickly dissociates into bicarbonate ions and hydrogen ions. This reaction is thousand times faster in RBCs as compared to plasma, as RBCs contain carbonic anhydrase enzyme that reversibe catalyses the conversion of `CO_(2)` and water to carbonic acid.
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Knowledge Check

  • An enzyme increases the rate of a reaction by

    A
    supplying the energy requried to start the reaction
    B
    increasing the rate of random collisions of molecules
    C
    removing the product of the reaction so allowing it to continue
    D
    bringing the reacting molecules into precise orientation with each other

  • How enzymes increases the rate of reactions ?

    A
    By lowering activation energy
    B
    By changing activation energy
    C
    By changing equilibrium constant
    D
    By forming enzyme substrate complex

  • Relative rate of reaction with H_(2)O

    A
    `(I)gt(II)gt(III)`
    B
    `(II)gt(I)gt(III)`
    C
    `(III)gt(II)gt(I)`
    D
    `(III)gt(I)gt(II)`

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