BACHELOR OF SCIENCE Lecture Notes - Food Preservation, Antacid, Antihistamine

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This material is relevant for all competitive exams as well. Drugs and chemotherapy drugs: antacids, antihistamines, neurologically active. Drugs are low molecular mass chemicals which interact with macromolecular targets and produce a biological response. Range of molecular masses: 100 - 500 u. Biological response can be positive or negative. Chemicals that are useful in diagnostics, treatment and prevention of diseases. They are drugs that are always useful. All medicines are drugs but all drugs are not medicines. Therapeutic effect; desirable and beneficial effect of drug like treatment of symptoms and cure of disease on a living body. Chemotherapy: use of chemicals to destroy infectious microbes without causing any injury to host. Enzymes: proteins that perform role of biological catalyst in body. Active site of enzymes hold the substrate molecule in a suitable position so that it can be attacked by reagents effectively. Enzymes can provide functional groups that attack the substrate and carry out the reaction.

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