Assertion : Activity of an enzyme is pH depen | vedclass

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(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.

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(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-$I$	List-$II$
$a$. Zymase	$i$. Stomach
$b$. Diastase	$ii$. Yeast
$c$. Urease	$iii$. Malt
$d$. Pepsin	$iv$. Soyabean

Column-$I$ (Enzymes)	Column-$II$ (Reactions)
$A$. Invertase	$1$. Decomposition of urea into $NH_3$ and $CO_2$
$B$. Maltase	$2$. Conversion of glucose into ethyl alcohol
$C$. Pepsin	$3$. Hydrolysis of maltose into glucose
$D$. Urease	$4$. Hydrolysis of cane sugar
$E$. Zymase	$5$. Hydrolysis of proteins into peptides

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

Similar Questions

Which hormone helps in the conversion of glucose into glycogen?

Match List-$I$ with List-$II$.

List-$I$ List-$II$

$a$. Zymase $i$. Stomach

$b$. Diastase $ii$. Yeast

$c$. Urease $iii$. Malt

$d$. Pepsin $iv$. Soyabean

Choose the correct answer from the options given below:

Invertase brings about the conversion of

Organic catalysts differ from inorganic catalysts in which of the following ways?

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