Which of the following will occur if there is an increase in enzyme or substrate concentration? interfere with the reaction. increase the rate of reaction. decrease the rate of reaction. not change the rate of product produced reduce the rate of product produced.
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Which of the following will occur if there is an increase in enzyme or substrate concentration?
- interfere with the reaction.
- increase the
rate of reaction . - decrease the rate of reaction.
- not change the rate of product produced
- reduce the rate of product produced.
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- Indicate whether each of the following statements about enzyme terminology is TRUE or FALSE. All conjugated enzymes contain a cofactor. An apoenzyme has both a protein and nonprotein part. Metal ions cannot be present in a cofactor. An apoenzyme is present in all holoenzymes. Simple enzymes cannot contain cofactors. A holoenzyme has both a protein and nonprotein part. Metal atoms are present in all conjugated proteins. A cofactor is present in some, but not all, conjugated enzymes.Please select all of the following statements that are true. Cofactors involve the use of vitamins to assist enzymes Competitive inhibitors bind to the same active site as the substrate. When the substrate binds to the enzyme the reaction rate increases. Non-competitive inhibitors can act as both inhibitors and activators.Enzymes catalyze the rapid formation of product by: lowering the Gibbs free energy of the product raising the Gibbs free energy of the substrate lowering the activation energy between the substrate and the product raising the activation energy between the substrate and the product changing the AG (the change in Gibbs free energy) of the reaction
- Indicate whether each of the following statements about an enzyme active site is true or false. It is the location where substrate molecules are produced. It always has a fixed, rigid geometry. It always has a geometrical shape exactly complementary to that of substrate. It always accommodates several structurally related substrates. It is the location where substrate molecules are converted to product molecules. It always has a shape that has a degree of flexibility to it. It always accommodates only one specific substrate.Which of the following affects the rate of enzyme driven reaction? rate constant air pressure concentration of enzyme concentration of substrate light intensity pH temperatureWhich of the following statements regarding enzyme catalysis is false? All options are false. Once formed, the transition state slowly proceeds to forming the product at a rate determined by cofactor binding The free energy of binding of the enzyme to the transition state is more favorable than the free energy of binding of the enzyme to the substrate The substrate and active site of the enzyme are solvated to promote enzyme-substrate interaction Once formed, the product dissociates from the enzyme after ATP hydrolysis in order to regenerate the active site
- An inhibitor was added to an enzyme and the expected rate of the reaction was not detected and the substrate was not utilized at all. This inhibitor is (choose one answer only): Is un-competitive, meaning the inhibitor binds to a site near the active site. Is competitive, meaning the inhibitor binds directly to the same active site as the subtrate. Is non-competitive, meaning the inhibitor binds to site other than the active site as the subtrate. Is irreversible, meaning the inhibitor binds covalently to the enzyme keeping the enzyme inactive permanently.Which of the following describe what enzymes such as Chymotrysin accomplish to allow products to form and be released by the enzyme active site? Group of answer choices catalyze chemical eactions that are thermodynamically unfavorable to occur establish a more stable transition state at a higher energy level to perform a catalysis reaction redce the chemical energy held within a chemical bond modify chemical structure of a substrate to "fit" within the active siteWhich of the following statements is true about effect of substrate concentration on enzyme activity ? The rate of reaction increases as the substrate concentration increases up to certain limit at which the reaction rate is maximal (Vmax.) At Vmax, the enzyme is completely saturated with the substrate, At Vmax, any increase in substrate concentration don't affect the reaction rate. All of them
- All of the following are characteristics of the active site of an enzyme EXCEPT? Select the correct response. It has a complementary shape to its substrate. It is the binding site for many different kinds of molecules. It is found somewhere in the interior of the enzyme. It has less water content compared to the cytoplasm.When the enzyme hexokinase binds to glucose and ATP it undergoes a conformational change. All of the following are true about this enzyme-substrate binding EXCEPT: The active site changes shape so that it binds more tightly to the substrates The substrates are optimally positioned for the reaction to occur The substrates become contorted or strained, which increases their reactivity The activation energy of the reaction increasesAs the amount of substrate is increased in an enzyme-substrate reaction, which of the following will happen? the reaction is inhibited the amount of product increases. enzymes become denatured faster. enzymes work faster. the amount of enzyme also increases proportionally.