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Human Health and Disease · Question 43

NEET 2016 (Phase 2)MCQMedium📈 Topic in 12% papers+4−1
1

Which of the following is correct regarding AIDS causative agent HIV ?

  1. HIV is unenveloped retrovirus
  2. HIV is enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase.
  3. HIV does not escape but attacks the acquired immune response
  4. HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase

Answer

(4) HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase

Solution

HIV belongs to the retroviruses, which have an envelope enclosing an RNA genome.

⇒ The HIV core contains two identical copies of single-stranded RNA, each associated with a molecule of reverse transcriptase.

⇒ HIV infects helper T-lymphocytes (TH cells) and thus escapes as well as attacks the acquired immune response, finally causing immunodeficiency.

∴ Only statement (4) is correct.

Answer: (4)

NEET 2016 (Phase 2)

Keep practising — Human Health and Disease

2

Which of the following immunoglobulins does constitute the largest percentage in human milk?

  1. IgM
  2. IgA
  3. IgG
  4. IgD
AIPMT 2015
3

Which of the following diseases is caused by a protozoan?

  1. Influenza
  2. Babesiosis
  3. Blastomycosis
  4. Syphilis
AIPMT 2015
4

Grafted kidney may be rejected in a patient due to -

  1. Humoral immune response
  2. Cell-mediated immune response
  3. Passive immune response
  4. Innate immune response
AIPMT 2015
5

Match each disease with its correct type of vaccine

  1. A - (i), B - (ii), C - (iv), D - (iii)
  2. A - (iv), B - (iii), C - (ii), D - (i)
  3. A - (ii), B - (i), C - (iii), D - (iv)
  4. A - (iii), B - (ii), C - (iv), D - (i)
AIPMT 2015 (Cancelled)
6

The active form of Entamoeba histolytica feeds upon

  1. food in intestine
  2. mucosa and submucosa of colon only
  3. blood only
  4. erythrocytes, mucosa and submucosa of colon
AIPMT 2015 (Cancelled)
7

HIV that causes AIDS, first starts destroying

  1. thrombocytes
  2. leucocytes
  3. helper T-lymphocytes
  4. B-lymphocytes
AIPMT 2015 (Cancelled)
8

Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown below? [Figure]

  1. Hallucinogen
  2. Stimulant
  3. Depressant
  4. Pain-killer
AIPMT 2014
9

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.
AIPMT 2014
10

Infection of Ascaris usually occurs by :

  1. Tsetse fly
  2. mosquito bite
  3. drinking water containing eggs of Ascaris
  4. eating imperfectly cooked pork
NEET 2013
11

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
NEET 2013 (Karnataka)

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