Question

Identify the wrong statemets.
$\left(a\right)$ The substrate binds to active site of enzyme and not fitting into active site
$\left(b\right)$ The binding of substrate induces the enzyme to alter its shape
$\left(c\right)$ Chemical bonds of substrate break down not to form new enzyme-product complex
$\left(d\right)$ The enzyme releases the products of the reaction and runs through catalytic cycle once again

• A. $a,c$
• B. $b,d$
• C. $b,c$
• D. $a,d$

Answer 1

Answer: (A)

$a,c$

The given statements explain the catalytic cycle of an enzyme action.

1. The first statement is wrong as the substrate binds to the active site of enzyme and fits into it. This is because the shape of the substrate is complementary to the shape of enzyme active site and thus enzymes are substrate specific.

2. Then the binding of the substrate induces a conformational change in the shape of enzyme to tightly fit the substrate. Thus the second statement is correct.

3. The active site of enzyme now in close proximity of the substrate breaks the chemical bonds of the substrate and the new enzyme substrate complex is formed. Thus, the statement 3 is wrong.

4. Finally the enzyme releases the products of reaction and the free enzyme is ready to bind to another molecule of substrate and run through the catalytic cycle once again.

Thus, the correct answer is option A.