Question

Which of the following stages is essential for enzyme catalyzed reaction to occur?

A. Enzyme-substrate binding stage

B. Substrate transitional stage

C. Enzyme-product releasing stage

D. A and C

E. A,B and C

In terms of source for activation energy, which of the followings is possible?

A. releasing of solvent molecules or atoms from enzymes

B. releasing of substrates or products from enzymes

C. locally or globally reversible changes in enzyme structure

D. All above

E. None above

Answer 1

Following is the - complete - Answer -&- Explanation - for the first question ( i.e. Question - related with "enzyme catalyzed reaction"  ) , of the given - Question Set - in .... Typed format....

$\Rightarrow$Answer:

Option - (E): A , B - and - C

$\Rightarrow$Explanation:

As we know, following , i.e. Enzyme - Substrate binding stage (A) - and - Enzyme-Product releasing stage (C) are both the stages of enzyme catalysis reaction...

- First of all - the Enzyme molecules -attack the active sites - i.e. the special areas of the Substrate molecules.

And, in this first stage - the enzyme catalysis reaction - starts. This stage - is called the : Enzyme - Substrate binding stage (A) - of the reaction.

- Secondly - in the third stage - of the reaction - Catalysis happens - during which substrate - is either broken

down - or - combined with other molecules - a stage which can be called : Substrate Transition Stage ( B ).

- Lastly - the Enzyme molecule - in the last stage of the reaction - the enzyme releases the products of the

reaction -and- gets back to its original shape - fit to react with other substrate molecules. ...afterwards...

This stage is called: Enzyme-Product releasing stage (C).

$\Rightarrow$ Therefore - our Answer - is :

Option (E): A, B -and- C