Competitive Exams: Medical Science MCQs (Practice-Test 47 of 135)

  1. Consider the following pollutants:

    1. Sulphur dioxide

    2. Formaldehyde

    3. Nitrogen dioxide

    4. carbon monoxide

    Major pollutants of outdoor air include

    1. 1, 2 and 4

    2. 1, 2 and 3

    3. 1, 3 and 4

    4. 2, 3 and 4

  2. Which one of the following epidemiological methods is used to assess the poliomyelitis problem in a community?

    1. Epidemiological surveys

    2. Lameness surveys

    3. Sentinel surveys

    4. Serological surveys

  3. Which one of the following is the main cause of diarrhea in a case of cholera?

    1. Destruction of intestinal mucosa by invading cholera vibrioes

    2. Increased peristalsis by enterotoxins

    3. Increased in take of fluids due to intense thirst

    4. Increased exudation of fluid into intestinal lumen

  4. When one of the following statements about Natural Killer (NK) cells is NOT correct?

    1. NK cells can lyse tumour cells and virus infected cells in vitro, without previous sensitization

    2. NK cells are found in peripheral blood and lymphoid tissue

    3. NK cells are CD 3 positive

    4. NK cells lyse the target cells by antibody dependent cellular cytotoxicity

    • Assertion (A): Carcinoma of lung is most likely to metastasize to the right supraclavicular lymph node.
    • Reason (R): Lymphatic drainage from both lung is, directed to the right supraclavicular node.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Consumption of alcohol causes aggravation of gout.
    • Reason (R): Alcohol increases the formation of lactic acid.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Man does not suffer any from Pellagra if the regularly consumes high quality protein. 12 of 1.
    • Reason (R): High quality protein contains niacin.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Incompletely descended testis is also known as ectopic testis.
    • Reason (R): Imperfect development is a significant factor in incomplete descent of the organ.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Patients with isolated IgA deficiency show a higher incidence of respiratory infections.
    • Reason (R): IgA protects from microbial invasion of the respiratory mucosa.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Pulmonary arterial hypertension occurs in status asthmaticus.
    • Reason (R): Arterial hypoxemia in these patients leads to left ventricular failure.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Spider angiomas in patients with cirrhosis of liver are usually present above umbilicus.
    • Reason (R): Upper part of body is exposed to certain elements which are toxic in the presence of an internal stimulus.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Carcinoma of the left side of the colon presents more frequently with intestinal obstruction.
    • Reason (R): Neoplasms of colon on the left side are of stenosing variety, the fecal content is relatively solid and the lumen of the bowel comparatively narrow.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Downstaging of cervical cancer is contemplated in areas where cytological screening is not possible for years.
    • Reason (R): It prevents the spread of cancer.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true

    • Assertion (A): Accidents represent major epidemic of non communicable diseases of present times.
    • Reason (R): The fatality rate in road accidents in India is higher than in developed countries.
    1. Both A and R are true and R is the correct explanation of A

    2. Both A and R are true but R is NOT the correct explanation of A

    3. A is true but R is false

    4. A is false but R is true