Multiple Choice QuestionsSmoking addiction is harmful because it produces polycyclic aromatic hydrocarbons, which cause
reduction in oxygen transport
increase in blood pressure
cancer
retardation of growth of foetus.
C.
cancer
Cancer is caused by cells dividing repeatedly out of control. They cease to respond to the normal signals around them and form unspecialised masses of cells called tumours. Lung cancer usually starts in the epithelium of the bronchioles, so-called bronchial carcinoma. It then usually spreads throughout the lungs. It is caused almost exclusively by smoking.
Tobacco smoke contains chemicals responsible for lung cancer. The most important of these are
polycyclic hydrocarbons which are converted in the body to carcinogens.
Besides, carbon monoxide combines with haemoglobin and reduces oxygen transport about 15% in smokers and nicotine increases blood pressure, heart rate and constriction of blood vessels.
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
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.
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