The correct answer is (4) B ⟶ C (Enzyme EB). Introduction Multistep biochemical pathways often involve several enzyme-catalyzed reactions, each with unique kinetic properties. The rate-limiting step determines the overall speed […]
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CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Michaelis-Menten Enzyme Kinetics: Understanding Km, kcat, and Their Relationships
The correct answer is (2) B and D. Introduction Michaelis-Menten kinetics is essential for understanding how enzymes catalyze biochemical reactions. Two critical parameters—Km (Michaelis constant) and kcat (turnover number)—describe how efficiently […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Clarifying Enzyme Kinetics and Inhibition: Correct Statements on Substrate Concentration and Reaction Velocity
(DEC 2019 ASSAM) 21. Following are statements on enzyme kinetics. Choose the correct statement. (1) Sufficiently high concentrations of substrate cannot completely relieve competitive inhibition. (2) Sufficiently high concentrations of […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Steady-State Hypothesis in Enzyme Kinetics: Explanation and Key Assumptions
(DEC 2006) 20. The steady state hypothesis for enzyme suggest that (1) Rate of formation of ES complex is equal to rate of breakdown of ES complex (2) Rate of […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Understanding Michaelis-Menten Equation: Key Assumptions and Rate-Limiting Step
(DEC 2011) 19. Michaelis and Menten derived their equation using which of the following assumption? (1) Rate limiting step in the reaction is the breakdown of ES complex to product […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Role of Restriction Endonucleases in Viral Defense and Impact of Enzyme Turnover Rate on Host Benefit
(JUNE 2011) 18. A researcher has isolated a restriction endonuclease that cleaves at only one specific 10 base pair site. A) Would this enzyme be useful in protecting cells from […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Roles of Coenzymes as Transient Chemical Group Carriers: Comprehensive Matching Guide
The correct answer is (2) A-(ii), B-(i), C-(iv), D-(iii). Introduction Coenzymes are vital non-protein molecules that partner with enzymes to catalyze a wide range of biological reactions. They often serve as […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Equilibrium Constant in Enzyme-Catalyzed Reaction with Rate Enhancement
The correct answer is (3) 10. Introduction Understanding the relationship between rate constants and equilibrium constants in enzyme-catalyzed reactions is critical in biochemistry. Enzymes accelerate reactions but do not alter their […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Calculating Equilibrium Constant in Enzyme-Catalyzed Reaction with Rate Enhancement
(NOV 2020-1) 15. The rate constant for conversion of a substrate into the product is 10-4 s-1, while the reverse rate constant 10-6 s-1. An enzyme enhance the rate of […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Common Misconceptions About Enzyme Properties: Clarifying Wrong Statements on Enzyme Catalysis
(DEC 2017) 14. From the following statements A. Enzymes enhance reaction rates by a factor of 2 to 10. B. The activation energy for a reaction is lowered by enzymes. […]
