186: Which one of the following sets is correctly matched ?
(a) Diphtheria, Pneumonia and Leprosy : Hereditary
(b) AIDS, Syphilis and Gonorrhoea : Bacterial
(c) Colour blindness, Hemophilia and Sickle cell anaemia : Sex linked
(d) Polio, Japanese B encephalitis and plague : Viral
Explanation:
Sex linked (hereditary) diseases : Colour blindness, Haemophilia and Sickle cell anaemia.
Bacterial diseases : Diphtheria, Pneumonia, Leprosy, Syphilis, Gonorrhoea and Plague.
Viral diseases : AIDS (HIV virus), Polio and Japanese B encephalitis.
187: Which one of the following diseases is caused due to defective genes?
(a) Ulcer
(b) Haemophilia
(c) Diabetes
(d) Cancer
188: In a fluorescent tube which of the following components are found?
(a) Mercury vapour
(b) Argon and carbon dioxide
(c) Helium and oxygen
(d) Argon and neon
189: The major chemical compound found in human kidney stones is
(a) Uric acid
(b) Calcium carbonate
(c) Calcium oxalate
(d) Calcium sulphate
Explanation:
Kidney stones consist of mucopolysacharides, urates, calcium oxalate, calcium phosphate, and calcium carbonate. Urate and oxalate stones are most common.
190: A person with AB blood group is sometimes called a universal recipient because of the
(a) lack of antigen in his blood
(b) lack of antibodies in his blood
(c) lack of both antigens and antibodies in his blood
(d) presence of antibodies in his blood