1. why the same enzyme does not break - down everything we eat ? 2. why is calcium sulphate hemihydrate called ' plaster off paris ' ?
Answers
- Different enzymes are produced by different parts of body.
The functions of enzymes differ from their location and part of body from where they are secreted. this is why same enzyme cannot break everything we eat.
2. calcium hemihydrate is a fine white powder ,it hardens when moistened and allowed to dry . it is prepared from gypsum.
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1. Enzymes are specific in their action, specific enzymes are needed for break-down of a particular substance . That's why same emzyme does not break- down everything we eat .
2. Plaster of paris is a white powder and on mixing with water , it changes to gypsum once again giving a hard solid mass . on heating gypsum at 373k , it loses water molecules and becomes calcium sulphate hemihydrate ( CaSO4. 1/2H2O ) . so , calcium sulphate hemihydrate called ' plaster of paris ' .