## catalyst

$V_{0} = \frac{V_{max}[S]}{K_{M} + [S]}; K_{M} = \frac{[E][S]}{[ES]}$

Clarissa Nava 3H
Posts: 60
Joined: Fri Sep 29, 2017 7:05 am

### catalyst

why is an enzymes a catalyst ?

MariahClark 2F
Posts: 60
Joined: Wed Nov 15, 2017 3:04 am

### Re: catalyst

Enzymes are proteins functioning as catalysts that speed up reactions by lowering the activation energy. A simple and succinct definition of an enzyme is that it is a biological catalyst that accelerates a chemical reaction without altering its equilibrium.

Bella Townsend
Posts: 50
Joined: Wed Feb 20, 2019 12:18 am

### Re: catalyst

One of the key features of an enzyme which is used as a catalyst is that it is not used up in the reaction. Therefore, it is not in the overall reaction.

Riya Sood 4G
Posts: 160
Joined: Sat Aug 24, 2019 12:18 am

### Re: catalyst

Enzymes provide an alternative pathway for the reaction to occur faster. They lower the activation energy, but the change in Enthalpy and Gibbs free energy stays the same because they are state properties independent of the pathway.

Tauhid Islam- 1H
Posts: 64
Joined: Fri Aug 02, 2019 12:15 am

### Re: catalyst

Enzymes are just biological catalysts. They are able to lower the activation energy for reactions, the lower the activation energy, the faster the rate. The enzymes speed up the reactions by lowering the activation energy.

Jeremy_Guiman2E
Posts: 82
Joined: Fri Sep 28, 2018 12:29 am

### Re: catalyst

Enzymes are catalysts because they are not consumed in reactions but can accelerate reactions by lowering activation energies.