If the Keq for an enzymatic reaction is greater than 1, the reaction both (a) and (b) can not occur without the input of energy will be endergonic none of these TRUE ANSWER : ? YOUR ANSWER : ?
The ability of a competitive inhibitor to bind to an active site in an allosterically controlled enzyme is __________ than the ability of a non-competitive inhibitor to bind to an active site in the same allosterically controlled enzyme. greater lesser approximately equal half TRUE ANSWER : ? YOUR ANSWER : ?
An enzyme that is always produced, regardless of the presence of substrates or the end products, is called a constitutive enzyme a repressible enzyme an isoenzyme an allosteric enzyme TRUE ANSWER : ? YOUR ANSWER : ?
If the free energy change (ΔG) in a reaction is a negative value, it indicates that the reaction absorbs energy reaction is in negative direction reaction is in positive direction reaction releases energy TRUE ANSWER : ? YOUR ANSWER : ?
To a living organism, which of the following has the greatest amount of available energy per molecule? AMP ADP H2O ATP TRUE ANSWER : ? YOUR ANSWER : ?
The ability of CTP to bind to aspartate carbamoyltransferase and shut down the synthesis of more CTP is an example of enzyme induction none of these enzyme repression feedback inhibition of enzyme activity TRUE ANSWER : ? YOUR ANSWER : ?
In the reaction, C6H12O6+ 6O2 → 6CO2 + 6H2O + energy, which component is being oxidized? O2 CO2 H2O C6H12O6 TRUE ANSWER : ? YOUR ANSWER : ?
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. competitive inhibition repression induction compartmentation TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is the best evidence for the lock and key theory of enzyme action? Enzymes speed up reactions by definite amounts Compounds similar in structure to the substrate inhibit enzyme activity Enzymes are found in living organisms and speed up certain reactions Enzymes determine the direction of a reaction TRUE ANSWER : ? YOUR ANSWER : ?
A substrate binds to its enzyme at a location called the __________ site. polypeptide active coenzyme substrate TRUE ANSWER : ? YOUR ANSWER : ?