Human Health and Disease · Question 50

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

1. Within 15 days of sexual contact with an infected person.
2. When the infected retro virus enters host cells.
3. When HIV damages large number of helper T-Lymphocytes.
4. When the viral DNA is produced by reverse transcriptase.

Infection of Ascaris usually occurs by :

1. Tsetse fly
2. mosquito bite
3. drinking water containing eggs of Ascaris
4. eating imperfectly cooked pork

Identify the site where Wuchereria bancrofti is normally found on human body :

1. Blood vessels of the thigh region
2. Lymphatic vessels of the lower limbs
3. Muscles of the legs
4. Skin between the fingers

Which one of the following is a hallucinogenic drug?

1. Morphine
2. Opium
3. Caffeine
4. Lysergic acid diethylamide

Identify the molecules (a) and (b) shown below and select the right option giving their source and use. [figure]

1. Molecule (b) Heroin, Source Cannabis sativa, Use Depressant and slows down body functions
2. Molecule (a) Morphine, Source Papaver somniferum, Use Sedative and pain killer
3. Molecule (a) Cocaine, Source Erythroxylum coca, Use Accelerates the transport of dopamine
4. Molecule (b) Cannabinoid, Source Atropa belladonna, Use Produces hallucinations

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

1. Rejection of a kidney graft is the function of B-lymphocytes.
2. Preformed antibodies need to be injected to treat the bite by a viper snake.
3. The antibodies against smallpox pathogen are produced by T-lymphocytes
4. Antibodies are protein molecules, each of which has four light chains.

Motile zygote of Plasmodium occurs in

1. Human liver
2. Salivary glands of Anopheles
3. Human RBCs
4. Gut of female Anopheles

Common cold differs from pneumonia in that

1. Pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease
2. Pneumonia can be prevented by a live attenuated bacterial vaccine whereas the common cold has no effective vaccine
3. Pneumonia is caused by a virus while the common cold is caused by the bacterium Haemophilus influenzae
4. Pneumonia pathogen infects alveoli whereas the common cold affects nose and respiratory passage but not the lungs

Which one of the following is not a property of cancerous cells whereas the remaining three are ?

1. They do not remain confined in the area of formation
2. They divide in an uncontrolled manner
3. They compete with normal cells for vital nutrients
4. They show contact inhibition

Cirrhosis of liver is caused by the chronic intake of

1. Cocaine
2. Alcohol
3. Tobacco (Chewing)
4. Opium