Enzyme Reaction Which of the following is the best evidence for the lock and key theory of enzyme action? Enzymes are found in living organisms and speed up certain reactions Compounds similar in structure to the substrate inhibit enzyme activity Enzymes speed up reactions by definite amounts Enzymes determine the direction of a reaction Enzymes are found in living organisms and speed up certain reactions Compounds similar in structure to the substrate inhibit enzyme activity Enzymes speed up reactions by definite amounts Enzymes determine the direction of a reaction ANSWER DOWNLOAD EXAMIANS APP
Enzyme Reaction If the Keq for an enzymatic reaction is greater than 1, the reaction none of these will be endergonic both (a) and (b) can not occur without the input of energy none of these will be endergonic both (a) and (b) can not occur without the input of energy ANSWER DOWNLOAD EXAMIANS APP
Enzyme Reaction An enzyme that is always produced, regardless of the presence of substrates or the end products, is called an isoenzyme an allosteric enzyme a constitutive enzyme a repressible enzyme an isoenzyme an allosteric enzyme a constitutive enzyme a repressible enzyme ANSWER DOWNLOAD EXAMIANS APP
Enzyme Reaction The ability of Vibrio fischeri to convert chemical energy directly into radiant energy in bioluminescence is an example of __________ at work. the third law of thermodynamics Shelford's law of tolerance the first law of thermodynamics Leibig's law of the minimum the third law of thermodynamics Shelford's law of tolerance the first law of thermodynamics Leibig's law of the minimum ANSWER DOWNLOAD EXAMIANS APP
Enzyme Reaction If the free energy change (ΔG) in a reaction is a negative value, it indicates that the reaction is in negative direction reaction releases energy reaction is in positive direction reaction absorbs energy reaction is in negative direction reaction releases energy reaction is in positive direction reaction absorbs energy ANSWER DOWNLOAD EXAMIANS APP
Enzyme Reaction The fact that β-oxidation of fatty acids, occurs in the mitochondria whereas fatty acid synthesis occurs in the cytoplasmic matrix, is an example of regulation of enzymatic activity by the __________ mechanism. induction competitive inhibition repression compartmentation induction competitive inhibition repression compartmentation ANSWER DOWNLOAD EXAMIANS APP
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