Which statement explains why the induced fit model is a more accurate description of enzyme/substrate bonding than the lock and key model? Enzymes have active sites that fit most substrates. Enzymes do not need active sites to bond to substrates. Enzymes have rigid active sites with flexible sites for co-factors. Enzymes do have flexible active sites that mold to substrates.
Question
Which statement explains why the induced fit model is a more accurate description of enzyme/substrate bonding than the lock and key model? Enzymes have active sites that fit most substrates. Enzymes do not need active sites to bond to substrates. Enzymes have rigid active sites with flexible sites for co-factors. Enzymes do have flexible active sites that mold to substrates.
Solution
The statement that explains why the induced fit model is a more accurate description of enzyme/substrate bonding than the lock and key model is: "Enzymes do have flexible active sites that mold to substrates."
Here's why:
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The lock and key model suggests that the enzyme's active site is already in the exact shape of the substrate, and the substrate fits in like a key in a lock. This model implies that each enzyme works with one substrate only.
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However, the induced fit model proposes that the enzyme's active site is flexible and changes shape to fit the substrate when it comes into contact. This model allows for the possibility that an enzyme can work with multiple similar substrates, not just one specific one.
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The statement "Enzymes have active sites that fit most substrates" is not entirely accurate because while enzymes can work with multiple substrates, they can't work with all substrates. They are still somewhat specific.
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The statement "Enzymes do not need active sites to bond to substrates" is incorrect because enzymes do need active sites to bond to substrates. The active site is where the substrate binds and the reaction takes place.
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The statement "Enzymes have rigid active sites with flexible sites for co-factors" is also not entirely accurate. While co-factors can indeed bind to other sites on the enzyme and affect its function, the active site itself is not rigid but flexible according to the induced fit model.
Therefore, the statement "Enzymes do have flexible active sites that mold to substrates" is the most accurate description of the induced fit model and why it is a more accurate description of enzyme/substrate bonding than the lock and key model.
Similar Questions
In the _______________ model of enzyme action, the enzyme is restricted to have a fixed conformation accommodating only substrates with complementary geometry.Question 6Select one:a.lock-and-keyb.induced fit
Which model states that the enzyme's active site is rigid and the substrate must exactly match the shape of the active site?Group of answer choicesAllosteric modelInhibitor modelLock and key modelInduced fit model PreviousNext
Enzymes facilitate chemical reactions that result in changes to a substrate. How does the induced-fit model of enzymes and substrates explain their function?A. The substrates attach to the enzyme, and the chemical reaction proceeds.B. The enzyme changes shape to fit the substrate, causing the transition state to occur. (CORRECT ANSWER)C. The enzyme induces a change in the substrate but is not changed itself during the reaction.INCORRECT ANSWERD. Both enzymes and substrates undergo dynamic changes, inducing the transitions state of the substrate.
One theoretical model of enzyme-substrate interaction explains enzyme catalysis as a function of the stabilization of the transition state by the enzyme active site. This is an example of the:A.catalysis mechanism.B.lock and key mechanism.C.Michaelis-Menten mechanism.D.induced-fit mechanism.
‘lock and key’ theory is used to explain how an enzyme works
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