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The induced fit model is a development of the lock-and-key model and assumes that an active site is flexible and changes shape until the substrate is completely bound. This model is similar to a person wearing a glove: the glove changes shape to fit the hand. The enzyme initially has a conformation that attracts its substrate.
One can think of molecular docking as a problem of “lock-and-key”, in which one wants to find the correct relative orientation of the “key” which will open up the “lock” (where on the surface of the lock is the key hole, which direction to turn the key after it is inserted, etc.). Here, the protein can be thought of as the “lock ...
A key question is therefore whether and how enzymes can change their enzymatic activities alongside. It is generally accepted that many new enzyme activities have evolved through gene duplication and mutation of the duplicate copies although evolution can also happen without duplication.
However, method is an ambiguous concept in language teaching and has been used in many different ways. According to Bell, this variety in use "offers a challenge for anyone wishing to enter into the analysis or deconstruction of methods". [5] The methods of teaching language may be characterized into three principal views:
The direct method in teaching a language is directly establishing an immediate and audiovisual association between experience and expression; words and phrases; idioms and meanings; and rules and performances through the teachers' body and mental skills, avoiding involvement of the learners' mother tongue.
Some books on language teaching describe various methods that have been used in the past and end with the author's new method. These methods may reflect the author's views, and such presentations may de-emphasize relations between old and new methods.
Pages for logged out editors learn more. Contributions; Talk; Lock and key model
There are varied approaches and methods used for language teaching. In eclectic approach, the teacher can choose from these different methods and approaches: Grammar-translation Method : It is a method of teaching languages by which students learn grammatical rules and then apply those rules by translating between the target language and the ...