Question

An enzyme is used to catalyze a metabolic reaction. What would most likely happen if an enzyme inhibitor were added during the reaction?

Answer 1

The inhibitor would bind to the products of the metabolic reaction.

The inhibitor would prevent the reaction from proceeding.

The inhibitor would cause the reverse reaction to occur.

The inhibitor would denature the enzyme and prevent it from functioning.

Answer 2

Hmm. Here comes the 1000 $ question: what kind of inhibitation?
But the inhibitor would prevent the reaction from proceeding (How much depends on what kind of inhibitation we are dealing with (reversible or irreversible inhibition))

Answer 3

The inhibitor would bind to the products of the metabolic reaction?

Answer 4

enzyme all it do to reaction is that it makes the reaction faster and slower.. and if it inhibitor eats the enzyme may be it favour revere reaction as it is metabolic

Answer 5

No. there is 2 kinds of inhibitation:
* Reversible inhibitation:
-competitive
- non-competitive
* irreversible inhibitation:

The competitive reversible inhibitation, there will be a inhibitor that tries to bind to the active site, becuase of this the speed the enzyme can catalyze chemical reactions drops.
The non-competitive reversible inhibitation is where the inhibitor binds to the enzyme outside the active site, but changes some of the shape, this does the speed the enzyme can catalyze chemical reactions drops.
Irreversibel inhibitation is where the inhibitor make a covalent bond to the active site and permanently blocks the active site. When this happens the enzyme can't catalyze chemical reactions at all!

Answer 6

So, the inhibitor would prevent the reaction from proceeding?

Answer 7

All in all yea

Answer 8

how do u know covalent bond will be formed

Answer 9

it dependss on the reaction i think so

Answer 10

Maybe. I am not sure, but i think a covalent bond is formed, other bonds world be to weak:
http://www.rcsb.org/pdb/101/motm.do?momID=54

Answer 11

You guys are just confusing me.

Answer 12

Sorry. the answer is "the inhibitor would prevent the reaction from proceeding?"

Answer 13

sorry.. i dont know the ans i just gav a logic becoz i didnt studied dis thing yet..

Answer 14

but what i studied yet acc. to that i have given my ans.

Answer 15

there are three kinds of inhibitors.

1st: binds to the enzyme in the same place the substrate would, thus slowing down the reaction. (competitive inhibition)

2nd: binds to the enzyme-substrate-complex, thus preventing the product from dissociating from the enzyme (non-competitive inhibition)

3rd: binds to the enzyme in a different place than the substrate. the enzyme is deformed, rendering it unable to perform catalysis (allosteric inhibition)

as you see, no inhibitor binds to the products of the enzymatic reaction. also, no inhibitor can reverse the reaction.
answers 2 and 4 are possible. some inhibitors, like quicksilver, denature enzymes and work as inhibitors. in all cases, an inhibitor will drastically slow down the enzymatic reaction and "prevent it from proceeding".