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Enzymes are proteins that have a very specific structure. The region on the surface of an enzyme that is responsible for binding and converting the subtract into the product is called the active site.
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What are the two models that illustrate the binding of the substrate to the enzyme?
The two models are the lock-and-key model, where the substrate fits perfectly into the enzyme's active site like a key in a lock, and the induced fit model, where the active site of the enzyme changes its shape slightly to accommodate the substrate upon binding.
What is the active site on a substrate?
Enzymes and substrates will bind together to catalyse chemical reactions. The spot on the enzyme where the substrate will bind is called the active site of the enzyme. The enzyme and the substrate are usually a pretty close fit, hence the naming of the induced fit model.
What provides the best model to illustrate the way an enzyme interacts with a substrate molecule?
The lock-and-key model provides a useful illustration of how an enzyme interacts with a substrate molecule. In this model, the enzyme's active site is complementary in shape to the substrate, similar to a key fitting into a lock. This specificity allows for efficient catalysis of the reaction.
Compare enzyme activity with a lock and key?
Lock and key is an analogy of enzyme catalysis in a cellular reaction. The lock and key are compared directly to the substrate and enzyme, because of the high specificity of their physical shape. Enzymes participate in the reaction they catalyze. The reactant molecule (substrate) binds to the enzyme molecule at a particular location called the active site. (this is compared to the lock with keyhole) The highly specific nature of an enzyme is due to very precisely defined arrangement of atoms in the active site(again, this is the lock in the analogy). The substrate molecule must have a matching shape (here is the key) that will fit into the active site. The bond breaking and bond forming processes that transform the substrate into products occur while the substrate is bound to the active site of enzyme. In other words its something like a jigsaw puzzle where the substrate fits into the enzyme. The reaction occurs and the substrate then leaves the enzyme as products. ( Not my work. Found it on Yahoo Answers.....Do not give me credit...Thought I should do this to help people out =] ) Edited answer for readability and clarity - thanks!
What fits with an enzyme to make a reaction occur?
The substrate fits into the enzyme, much the way a key fits in a lock. Sometimes there are other "modulators" that also fit in the enzyme.
How is a substrate and its enzyme like a lock and key?
A substrate and its enzyme are like a lock and key because they have specific shapes that fit together perfectly. Just like a key must fit exactly into a lock to open it, the substrate must fit into the enzyme's active site for a reaction to occur. This specific interaction ensures that only the correct substrate is acted upon by the enzyme.
What is the difference between the lock and key model versus the induced fit model of the enzyme substrate complex?
The lock and key model means that the substrate must perfectly fit the enzyme, and the enzyme does not change. The induced fit model is different as when the substrate fits together with the enzyme, the enzyme itself will change to either join substrates together or break a substrate down.
Lock and key method?
In biology the lock and key method states that an enzyme and it's substrate are complementary and only the correct substrate can bind with the enzyme, this is due to the folding in the protein structure. However this theory is outdated and the inducted fit method is a much better representation.
What part of the enzyme does the substrate lock on to?
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How are substrates like keys and enzymes like locks?
Enzymes have an active site that is specific for a substrate - therefore enzymes only work when the right substrate is present. The surfaces of the enzyme and the substrate fit together - like a lock and key - allowing the enzyme to fulfil its function. The theory of "induced fit" is more widely accepted - it is similar, but the enzyme shape changes to accommodate the substrate.
Which statement describes the currently accepted theory of how an enzyme and its substrate fit together?
There is an enzyme explanation whose specificity states that an enzyme and its substrate possess specific complementary geometric shapes that fit exactly into one another. This is the lock and key explanation.Ê
What is the meant by the lock and key hypothesis?
The lock is the equivalent to that of an enzyme while the key is portrayed as the substrate. Like an enzyme, the lock can be reused many times as it remains chemically unchanged at the end of the reaction. Also, the fact that reactions occur only at the active site, or binding site, is showed as the key only being able to open the lock only at the keyhole, not anywhere else. The hypothesis also shows the fact that enzymes can only catalyse a specific substrate, showed as the lock, only being able to open with a specific key. Firstly,the substrate will enter the active side of the enzyme.then,the enzyme will change it shape slightly as the substrate binds.During this time,the substrate will be broken down.After that,the product will leave the active sides of the enzyme.
What are the two models that illustrate the binding of the substrate to the enzyme?
The two models are the lock-and-key model, where the substrate fits perfectly into the enzyme's active site like a key in a lock, and the induced fit model, where the active site of the enzyme changes its shape slightly to accommodate the substrate upon binding.
Which describes a model of a process in which the substrate fits into the active site to form a substrate enzyme compound?
The model you are referring to is the lock-and-key model of enzyme-substrate interaction. This model proposes that enzymes have specific active sites that perfectly fit the substrate, similar to how a lock fits a key. This precise fit allows for the formation of the enzyme-substrate complex and subsequent catalysis of the reaction.
What is key and lock theory?
It is when the enzyme (lock) fits exactly into the substrate (key) forming an enzyme substrate complex. It refers to enzymes and their substrates. The enzyme has an active site (lock) where the substrate that is complemetary fits in (key). Only substrates that fit perfectly into the enzymes active site will active the particular reaction, just like only 1 specific key will open a door.
What is the active site on a substrate?
Enzymes and substrates will bind together to catalyse chemical reactions. The spot on the enzyme where the substrate will bind is called the active site of the enzyme. The enzyme and the substrate are usually a pretty close fit, hence the naming of the induced fit model.
What provides the best model to illustrate the way an enzyme interacts with a substrate molecule?
The lock-and-key model provides a useful illustration of how an enzyme interacts with a substrate molecule. In this model, the enzyme's active site is complementary in shape to the substrate, similar to a key fitting into a lock. This specificity allows for efficient catalysis of the reaction.
