Assertion : Activity of an enzyme is pH depen | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The activity of an enzyme is highly $pH$ dependent because enzymes are proteins,and their tertiary structure (which determines their active site)

Vedclass · Accepted Answer

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

Vedclass · Answer

(B) The activity of an enzyme is highly $pH$ dependent because enzymes are proteins,and their tertiary structure (which determines their active site) is maintained by ionic and hydrogen bonds that are sensitive to $pH$ changes. When the $pH$ changes,these bonds break,leading to denaturation of the enzyme and loss of catalytic activity. While it is true that $pH$ can affect the solubility of proteins (as they are least soluble at their isoelectric point),this is not the primary reason why enzyme activity is $pH$ dependent. Therefore,both statements are correct,but the reason does not explain the assertion.

List-$I$ (Reaction)	List-$II$ (Enzyme)
$A$. Hydrolysis of starch to maltose	$I$. Diastase
$B$. Conversion of proteins to peptides	$II$. Pepsin
$C$. Hydrolysis of sucrose to glucose and fructose	$III$. Invertase
$D$. Glucose to ethanol	$IV$. Zymase

Assertion : Activity of an enzyme is $pH$ dependent.
Reason : Change in $pH$ affects the solubility of enzyme in water.

Similar Questions

Which among the following enzymes hydrolyzes $ \text{starch}$?

The enzyme $Pepsin$ hydrolyzes which of the following?

Identify the correct pair having amino acid $(A)$ and the hormone $(B)$ that is an iodinated derivative of the amino acid $(A)$. ($T$ and $Y$ represent one-letter codes for amino acids.)

Which of the following act as intracellular messengers?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : Activity of an enzyme is $pH$ dependent.Reason : Change in $pH$ affects the solubility of enzyme in water.