15. In organic synthesis, sodium methoxide (NaOCH3) is useful as a strong base and as a nucleophile. Sodium methoxide can easily be prepared by reacting which one of the following with methanol? (Hint: This reaction is seen in the pyrimethamine synthesis.) A) sodium chloride B) sodium sulfate C) sodium hydroxide D) sodium metal E) sodium nitrite 16. The reaction of ferrocene with acetic anhydride to form acetylferrocene and diacetylferrocene is an example of which type of reaction? A) a Grignard reaction B) a Wittig reaction C) a Friedel-Crafts reaction D) a Diels-Alder reaction E) a reductive amination reaction
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
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