NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
It is an enzyme that catalyzes the removal of water from a compound.
A
catalyst enzyme
B
carbonic enzyme
C
anhydrase
D
carbonic anhydrase
Explanation: 

Detailed explanation-1: -An anhydrase is defined as an enzyme that catalyzes the removal of a water molecule from a compound, and so it is this “reverse” reaction that gives carbonic anhydrase its name, because it removes a water molecule from carbonic acid.

Detailed explanation-2: -Carbonic anhydrase (CA; carbonate hydro-lyase, EC 4.2. 1.1) is a zinc-containing enzyme that catalyzes the reversible hydration of carbon dioxide: CO2+ H2O<–>HCO3(-)+H+. The enzyme is the target for drugs, such as acetazolamide, methazolamide, and dichlorphenamide, for the treatment of glaucoma.

Detailed explanation-3: -It is used to catalyze a reaction and is used for the conversion of carbon dioxide and water into the carbonic acid which then dissociates into protons and the bicarbonate ions. Complete answer: Lyase is the enzymes which help in the breakdown reactions without the help of hydrolysis.

Detailed explanation-4: -Carbonic anhydrase (CA) is a thoroughly studied enzyme. Its primary role is the rapid interconversion of carbon dioxide and bicarbonate in the cells, where carbon dioxide is produced, and in the lungs, where it is released from the blood. At the same time, it regulates pH homeostasis.

Detailed explanation-5: -Carbonic anhydrases (CAs) are zinc(II)‐containing metalloenzymes which catalyze the interconversion of carbon dioxide and hydrogencarbonate (see Chapter 3.08). They are also involved in a number of biosynthetic reactions including gluconeogenesis, lipogenesis, and amino acid and pyrimidine nucleotide biosynthesis.

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