Multiple Choice QuestionsThe 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
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
B.
If both assertion and reason are true but reason is not the correct explanation of assertion
Antigen is any substance that may be specifically bound by an antibody molecule. These are mainly proteins but can be polysaccharides, glycoproteins or other types of conjugated proteins, nucleic acids or chemicals.
Each antigen has many antigenic determinants, also called epitopes, of the antigen. As each antibody binds with 2 or more such determinants, one antigen can bind with many antibodies. The recognition ability is innate and develops without exposure to the antigen. When the antigen first enters the body, it can bind directly to the appropriate receptors on B cells. However, a full antibody response requires that the B cells contact helper T cells. ln the case of T cells, the antigen is taken up by an antigen-presenting cells and partially digested. A peptide fragment of it is presented to the appropriate receptors on T cells. In either case, the cells are stimulated to divide, forming clones of cells that respond to this antigen.
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.
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