An enzyme may catalyze a reaction by stressing or destabilizing the bonds of the substrates. this critical point in the enzymatic reaction is known as the

Catalysis An enzyme may catalyse a reaction by stressing or destabilizing the bonds of the substrates. This point in the enzymatic reaction is known as the Transition State.  An enzyme can couple a nonspontaneous reaction to a spontaneous reaction so that anabolic processes will occur.

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there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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