human health and diseases 2

Small pox has been eradicated from world

• Due to active vaccination against small pox on large scale

• Due to auto immunity developed by us

• Due to discovery of vaccine long ago

• injectable salk vaccine for small pox was easily available

Infective stages of malarial parasite is formed in

• Salivary glands of mosquito

• Intestine of mosquito

• Haemolymph of mosquito

• Stomach wall of mosquito

The symptoms of an allergic reaction develop in response to

• Interferons

• Interleukins

• Histamine

• Complement

Which of the following sets of diseases is caused by bacteria ?

• Tetanus and mumps

• Herpes and influenza

• Cholera and tetanus

• Typhoid and smallpox

On average, about how long does it take before an adult infected with HIV develops AIDS (in the absence of any drug treatment for the disease)?

• 2 years

• 3 years

• 5 - 10 years

• 20 years

Transplantation of tissues/organs fails often due to nonacceptance by the patient's body. Which type of immune-response is responsible for such rejections ?

• Cell - mediated immune response

• Hormonal immune response

• Physiological immune response

• Autoimmune response

MALT constitutes about ________ percent of the lymphoid tissue in human body.

• 20%

• 70%

• 10%

• 50 %

Motile zygote of Plasmodium occurs in :

• Gut of female Anolpheles

• Salivary glands of Anopheles

• Human RBCs

• Human liver

Which one of the following statements is correct with respect to immunity ?

• Preformed antibodies need to be injected to treat the bite by a viper snake

• The antibodies against small pox pathogen are produced by T - lymphocytes

• Antibodies are protein molecules, each of which has four light chains

• Rejection of a kidney graft is the function of B-lymphocytes

At which stage of HIV infection does one usually show symptoms of AIDS :

• Within 15 days of sexual contact with an infected person.

• When the infected retro virus enters host cells.

• When HIV damages large number of helper T-Lymphocytes.

• When the viral DNA is produced by reverse transcriptase