Question

Arrange the steps of catalytic action of an enzyme in order and choose the right option.
$\left(i\right)$ Enzyme releases products of reaction and the enzyme is free to bind to another substrate.
$\left(ii\right)$ Active site of enzyme is in close proximity of substrate and breaks the chemical bonds of substrate.
$\left(iii\right)$ Binding of substrate induces enzyme to alter its shape fitting more tightly around substrate.
$\left(iv\right)$ Substrate binds to active site of enzyme fitting into active site.

• A. $iv,iii,ii,i$
• B. $iii,ii,i,iv$
• C. $iv,ii,i,iii$
• D. $iii,iv,i,ii$

Answer 1

The correct option is A $iv,iii,ii,i$

iv) Part of enzyme where substrate molecules gets attached is known as active site. On attachment it forms enzyme substrate complex.

iii) Induced-fit model stated that when the substrate comes in contact with the active site, the active site modulates according to the shape of the substrate to form a enzyme substrate complex.

ii) Active site of enzyme is in close proximity of substrate and breaks the chemical bonds of substrate.

i) Enzyme releases products of reaction and the enzyme is free to bind to another substrate.

So, the correct answer is option A.