The correct answer is (3) A- iv, B- iii, C- ii, D- i. Introduction Enzyme kinetics is foundational for understanding biochemical reactions and enzyme activity. Properly identifying how various properties—such as […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES (62)
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Common Misconceptions in Enzyme Kinetics: Understanding Allosteric Behavior, Energy Change, Inhibition, and Catalytic Efficiency
(JUNE 2019) 47. Which one of the following statements is NOT correct? (1) Allosteric enzymes do not obey Michaelis-Menten kinetics. (2) The free-energy change provides information about the spontaneity but […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Turnover Number and Kinetic Isotope Effect in Proton and Deuteron Transfer Enzyme Reactions
(NOV 2020-1) 46. An enzyme catalyzed reaction comparing proton and deuteron transfer reactions yielded the following kinetic data Kcat [H], s-1 70.7 KM [H], mM 1.03 Kcat [H], s-1 10.3 […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Analyzing Serine Protease Catalytic Efficiency and Substrate Binding: Insights from Peptide Length and Sequence
The correct answer is (1) A and B. Introduction Enzyme kinetics provide critical insights into how substrate structure influences catalytic efficiency and binding. Serine proteases, important for protein digestion, exhibit unique […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Analyzing Elastase Substrate Specificity Using Kinetic Data: Rate, Residue Size, and Cleavage Preferences
The correct answer is (2) (B), (D), (E). Introduction Elastase is a proteolytic enzyme known for its specificity based on the size and nature of amino acid residues adjacent to its […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
pH Dependence of Enzyme Catalytic Efficiency: Role of Ionizable Residues in Catalysis
(DEC 2013 GU) 43. The Kcat/Km values of an enzyme-catalyzed reaction when plotted as a function of pH yielded a bell-shaped curve with a maximum around pH 6.0. Which of […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Comparing Catalytic Efficiency (kcat/Kmkcat/Km) from Enzyme Activity Curves: Analysis and Interpretation
The correct answer is (2) a > b > c. Introduction Catalytic efficiency (kcat/Kmkcat/Km) is a key measure in enzyme kinetics, representing how rapidly and effectively an enzyme converts substrate to […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Turnover Number (kcatkcat) for β-Amylase from Kinetic Data: A Detailed Guide
(MODEL PAPER) 41. A solution of 1% (w/v) starch at pH 6.7 is digested by 15 µg of ß-amylase (mol wt 152,000). The rate of maltose (mol wt = 342) […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Turnover Number (kcatkcat) for an Enzyme from Substrate and Product Data
(JUNE 2015) 40. A 1% (w/v) solution of a sugar polymer is digested by an enzyme (20µg, MW=200,000). The rate of monomer sugar (MW=400) liberated was determined to have a […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Turnover Number and Specific Activity of an Enzyme: Step-by-Step Guide
(JUNE 2016) 39. The turnover number and specific activity of an enzyme (molecular weight 40,000 D) in a reaction (Vmax= 4µmol of substrate reacted/ min, enzyme amount = 2 µg) […]
