The main reason why antibiotics could not solve all the problems of bacteria mediated diseases is

• insensitivity of the individual following prolonged exposure to antibiotics

• inactivation of antibiotics by bacterial enzymes

•  decreased efficiency of the immune system

•  the development of mutant strains resistant to antibiotics.

Which of the following sets includes all bacterial disease

• Cholera, typhoid, mumps

• Tetanus, tuberculosis, measles

• Malaria, mumps, poliomyelitis

• Diphtheria, leprosy, plague

153.

The binding of antibodies to the antigens to produce a large insoluble complex is known as

• antibody-antigen complex

• agglutination

• immunisation

• suppressor cell reaction.

When a man inhales air containing normal concentration of O₂ as well as CO he suffers from suffocation because

• CO reacts with O₂ reducing its percentage in air

• haemoglobin combines with CO instead of O₂ and forms carboxyhaemoglobin

• CO affects diaphragm and intercostal muscle

• CO affects the nerves of the lungs.

Which one of the following is the correct statement regarding the particular psychotropic drug specified

• Morphine leads to delusions and disturbed emotions.

• Barbiturates cause relaxation and temporary euphoria.

• Hashish causes alteration of thoughts, perceptions and hallucinations.

• Opium stimulates nervous system and causes hallucinations.

Assertion: Hybridoma cells are shifted to a medium deficient in nutrient which cannot be synthesized by myeloma cells.

Reason: This medium allows selection of hybridoma cells.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Which of the following match is correct?

• Emphysema : reduction of surface area of alveoli and bronchi

• Pneumonia : occupational disease with asbestos

• Silicosis : inflammation of alveoli

• Asthma : excessive secretion of bronchial mucus

Assertion : Antigen can be easily recognized because it has antigenic determinants.

Reason : The recognition ability is innate.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

When children play bare footed in pools of ditty water and flood water, they may suffer from disease like

• leptospirosis and bilharzia

• malaria, amoebic dysentery and leptospirosis

• bilharzia, infective hepatitis and diarrhoea

• guinea worm infection, elephantiasis and amoebic dysentery.

Which one of the following is an environment related disorder with the correct main cause

• Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.

• Blue baby disease (methaemoglobinaemia) due to heavy use of nitrogenous fertilizers in the area.

• Non-hodgkin's lymphoma found mainly in workers involved in manufacture of neem based pesticides.

• Skin cancer mainly in people exposed to benzene and methane.