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BioChemistry > QUESTIONS & ANSWERS > Biochemistry Enzymes Questions with Answers (All)

Biochemistry Enzymes Questions with Answers

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Enzymes and inorganic catalysts. Correct answer catalyze only thermodynamically possible reactions. Not used or changed during the reaction "midwife" Doesn't change the position of equilibrium or t ... he direction of the reaction. Usually act by forming a transient complex - stabilize the transition state. Specific features of enzymes correct answer accelerate reactions in much higher degree than inorganic catalysts Specificity of action Sensitivity to temperature Sensitivity to ph Biological catalyst Effect of temperature correct answer inorganic catalyst: reaction rate increases as t increases. Enzyme: function best at biological temperatures because they can denature like proteins. Optimum temperature of 37 deg usually. Enzymes denature above 45-50deg. Effect of ph correct answer ph changes the ionic charge of amino acid side chains on enzymes therefore they work best at a particular ph - most have an optimum of 7, but trypsin is 7.5 and pepsin (stomach) - 3 Enzyme specificity correct answer enzymes are picky molecules upon which enzyme act are called substrates. A given enzyme will only catalyze a single reaction or class of reactions with these substrates. [Show More]

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