BioChemistry > QUESTIONS & ANSWERS > Biochemistry Chapter 6: Enzymes Questions with Correct Solutions. (All)
Biochemistry Chapter 6: Enzymes Questions with Correct Solutions.
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Enzyme Correct Answer A biomolecule, either protein or RNA, that catalyzes a specific chemical reaction. It does not affect the equilibrium of the catalyzed reaction; it enhances the rate of the react... ion by providing a reaction path with a lower activation energy. Cofactor Correct Answer An inorganic or a coenzyme required for enzyme activity. Coenzyme Correct Answer An organic cofactor required for the action of certain enzymes; often has a vitamin component. Prosthetic Group Correct Answer A metal ion or an organic compound (other than an amino acid) that is covalently bound to a protein and is essential to its activity. Holoenzyme Correct Answer A catalytically active enzyme, including all necessary subunits, prosthetic groups, and cofactors. Apoenzyme Correct Answer The protein portion of an enzyme, exclusive of any organic or inorganic cofactors or prosthetic groups that might be required for catalytic activity. Apoprotein Correct Answer The protein portion of a protein, exclusive of any organic or inorganic cofactors or prosthetic groups that might be required for activity. Rate-limiting step Correct Answer (1) Generally, the step in an enzymatic reaction with the greatest activation energy or the transition state of highest free energy. (2) The slowest step in a metabolic pathway. [Show More]
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