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astarbiology.com/edexcel/lock-key-theory

LOCK & KEY THEORY Enzymes (e.g. globular proteins) are biological catalysts which speed up chemical reactions without being use dup in the process. They are vital b/c otherwise reactions would be too slow and the body can’t meet demands => cells die. Each enzyme only catalyses one reaction/c only a specific shaped […]

www.biologyonline.com/dictionary/lock-and-key-model

Like a key into a lock, only the correct size and shape of the substrate (the key) would fit into the active site (the key hole) of the enzyme (the lock). As for the induced fit model suggested by Daniel Koshland in 1958, it suggests that the active site continues to change until the substrate is completely bound to the active site of the ...

www.bbc.co.uk/bitesize/guides/z8wsgk7/revision/5

An enzyme is a protein that functions as a biological catalyst – a substance that speeds up a chemical reaction without being changed by the reaction. Lock and key model. Enzymes are folded into ...

biology-igcse.weebly.com/lock-and-key-model.html

#22 Enzymes - 'Lock and key' model Enzymes are very specific (fit to certain reaction only). To catalyse a reaction, enzyme molecule and substrate molecule need to meet and joint together by a temporary bond.

pediaa.com/what-is-the-difference-between-induced-fit-and-lock-and-key

The main difference between induced fit and lock and key model is that in the induced fit model, the active site of the enzyme does not completely fit to the substrate whereas in the lock and key model, the active site of the enzyme is the complement of the substrate and hence, it precisely fits to the substrate. Furthermore, in the induced fit model, the active site of the enzyme has to ...

chemistry.elmhurst.edu/vchembook/571lockkey.html

The specific action of an enzyme with a single substrate can be explained using a Lock and Key analogy first postulated in 1894 by Emil Fischer. In this analogy, the lock is the enzyme and the key is the substrate. Only the correctly sized key (substrate) fits into the key hole (active site) of the lock (enzyme).

www.reference.com/science/lock-key-model-enzymes-6ddf51d4ab150a27

The lock-and-key model refers to the way in which a substrate binds to an enzyme's active site. Similar to how a key has to be the correct one for a lock, no reaction takes place if an incorrect substrate tries to bind. The active site of an enzyme is a specific region that receives the substrate.

www.youtube.com/watch?v=oKdxBHsd20s

Animated biology With arpan 161,640 views 12:35 Mechanism of enzyme action Lock and key model and induced fit model by dr Hadi in URDU Hindi - Duration: 16:24.

medical-dictionary.thefreedictionary.com/Lock+and+Key+Model

A model that assumes an enzyme and substrate have a rigid interaction with each other, where a substrate fits in a key-like fashion to its lock, the enzyme, turning on the reaction