Biology · Enzymes
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What is not true about enzyme?
- A
The Keq of a reaction remains unchanged in the presence of an enzyme
- B
Enzymes speed up the rate of reaction in DNA synthesis
- C
Harsh, acidic conditions can completely denature an enzyme
- D
An enzyme is completely converted to product during metabolism.
Option A:
Kéq of reaction remains unchanged in the presence of an enzyme. This is true about enzymes. So, it will not be the right answer.
Option B ;
Enzymes speed up the rate of reactions. It is also a correct statement about enzymes. So, it will not be the right answer because we have to pick the wrong statement about enzymes.
Option C :
Extreme changes in pH alter the ionic charge of the acidic and basic groups of enzymes and therefore disrupt the ionic bonding (denaturation) that helps to maintain the specific shape of the enzyme.
KETS PMC Topic # 7 page # 157
Option : D
While enzymes do not change the amount of product formed in a reaction (no change to Keq) they do speed up the rate of reaction. It is also true that under certain conditions pH and/or heat can denature an enzyme. During a reaction, an enzyme does not get used up and is regenerated; enzymes are a type of catalyst.
So, a statement in option D is not true about enzymes. Hence, D is the right answer.
Kéq of reaction remains unchanged in the presence of an enzyme. This is true about enzymes. So, it will not be the right answer.
Enzymes speed up the rate of reactions. It is also a correct statement about enzymes. So, it will not be the right answer because we have to pick the wrong statement about enzymes.
Extreme changes in pH alter the ionic charge of the acidic and basic groups of enzymes and therefore disrupt the ionic bonding (denaturation) that helps to maintain the specific shape of the enzyme.
While enzymes do not change the amount of product formed in a reaction (no change to Keq) they do speed up the rate of reaction. It is also true that under certain conditions pH and/or heat can denature an enzyme. During a reaction, an enzyme does not get used up and is regenerated; enzymes are a type of catalyst.
So, a statement in option D is not true about enzymes. Hence, D is the right answer
Tagged under Biology · Enzymes · 2021