NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Once an enzyme does it’s work, the enzyme is ____
A
destroyed
B
unchanged
C
duplicated
D
changed
Explanation: 

Detailed explanation-1: -Second, they increase reaction rates without altering the chemical equilibrium between reactants and products. Note that the enzyme (E) is not altered by the reaction, so the chemical equilibrium remains unchanged, determined solely by the thermodynamic properties of S and P.

Detailed explanation-2: -Like all catalysts, enzymes take part in the reaction-that is how they provide an alternative reaction pathway. But they do not undergo permanent changes and so remain unchanged at the end of the reaction.

Detailed explanation-3: -Enzymes are not reactants and are not used up during the reaction. Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is released, unchanged, and can be used for another reaction.

Detailed explanation-4: -In fact, a hallmark property of enzymes is that they aren’t altered by the reactions they catalyze. When an enzyme is done catalyzing a reaction, it just releases the product (or products) and is ready for the next cycle of catalysis.

Detailed explanation-5: -This is because they do not change the free energy of the reactants or products. They only reduce the activation energy required for the reaction to go forward (Figure 1).

There is 1 question to complete.