(DEC 2001) 38. Which statement is CORRECT regarding specific activity of enzyme? (1) Depends on concentration of substrate and amount of free enzyme (2) The number of enzyme units per […]
Tag: csir enzymes kinetics PYQ
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![(DEC 2019) 37. Given below is the [P] vs time plot of an enzymatic reaction carried out by the enzyme X Which one of the following statements is the correct interpretation of the data? (1) The Km and Vmax of the enzyme X are 15 and 60 units, respectively. (2) The Vmax is 60 but the Km cannot be determined (3) The Km 15 but the Vmax cannot be determined (4) Neither the Km nor the Vmax of the enzyme X can be determined from these data](https://www.letstalkacademy.com/wp-content/uploads/2025/09/37.jpg)
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Interpreting [P] vs Time Plots in Enzyme Kinetics: Determining Vmax and Km
The correct answer is (2) The Vmax is 60 but the Km cannot be determined. Introduction Graphical data are fundamental tools in enzyme kinetics, helping derive quantitative parameters such as Vmax […]
![(SEPT 2022-1) 34. A student was asked to plot a graph representing enzyme kinetic data for initial velocity, vO , and substrate concentration [S] using any of the equations given below. The student used an equation for which neither X-axis nor Y-axis had independent variables. Which one of the following equation might the student have used? (1) 1/ vO = (Km/Vmax) 1/[S]+ 1/Vmax) (2) [S]/vO = [S]/Vmaxx + (Km /Vmax) (3) vO / [S] = (Vmax / Km) - vO / Km (4) vO = V max [S] / Km + [S]](https://www.letstalkacademy.com/wp-content/uploads/2025/09/34.jpg)
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Understanding Enzyme Kinetic Plots: Identifying Equations Without Independent Variables on Axes
(SEPT 2022-1) 34. A student was asked to plot a graph representing enzyme kinetic data for initial velocity, vO , and substrate concentration [S] using any of the equations given […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Km and Ks in Michaelis-Menten Enzyme Kinetics: Strategy and Application
The correct answer is (4) Kₛ: 400 μM, Kₘ: 408 μM. Introduction Michaelis-Menten kinetics provides a foundation for understanding enzyme-catalyzed reactions. Two important constants—substrate dissociation constant (KsKs) and Michaelis constant (KmKm)—help […]
![(FEB 2022-11) 31. What is the fold difference between v at [S] =Km and v at [S] = 1000 Km where v is the initial velocity of an enzyme catalyzed reaction, [S] is substrate concentration and Km is the Michaelis constant? (1) 1.998 (2) 1000 (3) 2.998 (4) 3.998](https://www.letstalkacademy.com/wp-content/uploads/2025/09/31.jpg)
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Fold Difference in Initial Velocity Between Substrate Concentrations Km and 1000 Km in Michaelis-Menten Enzyme Kinetics
(FEB 2022-11) 31. What is the fold difference between v at [S] =Km and v at [S] = 1000 Km where v is the initial velocity of an enzyme catalyzed […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Determining Substrate Concentration Increase for Enzyme Reaction Rate Enhancement from 10% to 90% of VmaxVmax
(JUNE 2008) 30. For an enzyme catalyzed reactions exhibiting Michalis Menten equation what would be increase in substrate concentration to increase the rate of reaction from 10 % of Vmax […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Substrate Concentration for 90% Maximum Velocity in Michaelis-Menten Enzyme Kinetics
(DEC 2007) 29. In a biochemical reaction catalyzed by enzyme following the Michales-Menten equation, what will be the substrate concentration, when the observed velocity of reaction is 90% of the […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Initial Velocity Using Michaelis-Menten Kinetics: Alkaline Phosphatase Example
(FEB 2022-1) 28. The enzyme alkaline phosphatase was tested for its catalytic activity using the substrate para- nitrophenylphosphate. The KM obtained was 10 mM and Vmax was 100umol/min. Which one […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Substrate Concentration for Half-Maximal Velocity: Understanding Michaelis Constant (Km)
(JUNE 2010) 27. Km for enzyme is equal to where (1) V0=Vmax (2) 2V0= Vmax (3) 4V0=Vmax (4) V0 = 2 Vmax The correct answer is (2) Introduction In enzymatic reactions, […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Understanding Michaelis Constant (Km) and Its Relationship with Substrate Concentration and Initial Velocity in Enzyme Kinetics
(JUNE 2004) 26. During an enzyme assay if the initial velocity Vo = 1/2 Vmax, then substrate concentration will be equal to (1) α Km (2) Km (3) 1/2 Km […]
