Question

Bell-shaped Curve is not obtained for eukaryotic enzyme when its reaction velocity is plotted against-
A. pH
B. Temperature
C. Substrate Concentration
D. \[{H^ + }\] ion Concentration

Answer 1

Hint: Enzymes are nothing but proteins. As we know, the proverb- all enzymes are proteins but all proteins are not enzymes. So, enzymes are definitely proteins. Enzymes are catalysts which enhance any reaction or speed up the process so that the activity can occur at a faster rate. Almost all reactions require enzymes like- transcription, translation, regulation and metabolism.

Complete answer:
Option A: PH- change in Ph can alter the reaction in which the enzyme is attached and working on. But the enzyme curved won’t change.
Option A is not the correct answer.
Option B: Temperature- In a reaction temperature is one of the major factors. Every major biological process requires temperature as a helper to amplify or degrade the reaction.
Option B is not the correct answer.
 Option C: Substrate Concentration- in enzyme kinetics when the velocity of a reaction is altered the bell-shaped cannot be obtained.
Option C is the correct answer.
Option D: \[{H^ + }\] ion Concentration- hydrogen ion concentration can identify the reaction whether it is performing in a pacer or not.
Option D is not the correct answer.

Hence, Option C is the correct answer.

Note:
Bell-shaped curve is ruled when the reaction in which enzymes are involved are under proportion. The substrate and enzyme reaction signify whether the enzyme is pacing the reaction at a faster rate or not. Various enzymes and other cofactors are used in the three processes such enzymes are- RNA polymerase I, RNA polymerase II, co-factors etc.