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Free AIDS and HIV Infection MCQs with Answers

49 AIDS and HIV Infection MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

HIV is a retrovirus that infects CD4 T lymphocytes and gradually weakens immune function, while AIDS is the advanced syndrome caused by severe immune deficiency. Coverage includes viral transmission, replication, disease progression, opportunistic infections, diagnosis, prevention and the difference between HIV infection and AIDS.

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49 questions · page 3 of 3

41. In HIV viruses, reverse transcriptase converts single-stranded RNA into double-stranded viral DNA. This process is called

  • A. Translation
  • B. Duplication
  • C. Replication
  • D. Reverse Transcription

Explanation: Reverse transcription is a process by which the DNA molecule is formed from the RNA template and the process is catalyzed by the enzyme…

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Correct answer: Reverse Transcription

42. Among followings, _ enzyme is naturally found in human immunodeficiency virus (HIV).

  • A. Ligase
  • B. Reverse Transcriptase
  • C. RNA Polymerase
  • D. DNA Polymerase

Explanation: HIV is a retrovirus. Its genome consists of RNA molecules, and it possesses a 'reverse transcriptase enzyme', which allows the virus to…

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Correct answer: Reverse Transcriptase

43. Most favorite host of HIV virus is?

  • A. Lymphocytes
  • B. RBC
  • C. T_Cell
  • D. B_ cells

Explanation: While HIV can infect other types of cells, including monocytes, macrophages, and dendritic cells, it has a particular affinity for…

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Correct answer: T_Cell

44. The enzyme "reverse transcriptase" present in HIV virus is:

  • A. 50 molecules per virion
  • B. 40 molecules per virion
  • C. 30 molecules per virion
  • D. 20 molecules per virion

Explanation: In summary, the specific number of reverse transcriptase molecules per HIV virion can vary due to factors like viral strain and infection…

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Correct answer: 50 molecules per virion

45. H.I.V contains

  • A. two RNAs
  • B. a single R.N.A
  • C. D.N.A and R.N.A
  • D. D.N.A

Explanation: HIV contains two identical RNAs enclosed within capsid

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Correct answer: two RNAs

46. World-wide, mortality rate per annum due to AIDS is more than:

  • A. One million
  • B. Two million
  • C. Three million
  • D. Five million

Explanation: AIDS is a major global health concern, with mortality rates exceeding three million per year worldwide.

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Correct answer: Three million

47. The three non-infective genes in HIV are;

  • A. gag, pol, rev
  • B. gag, pol, vpu
  • C. gag, pol, vpr
  • D. gag, pol, env

Explanation: Students should learn that gag, pol, env are the 3 non-infective genes of HIV

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Correct answer: gag, pol, env

48. HIV destroys a type of defense cell in the body called _ helper lymphocyte.

  • A. TD4
  • B. T4
  • C. C4
  • D. CD4

Explanation: HIV (Human Immunodeficiency Virus) primarily targets and infects CD4-positive T cells, which are crucial for coordinating the immune…

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Correct answer: CD4

49. The protein that form the matrix of HIV Virus

  • A. gp120
  • B. gp 11
  • C. p17
  • D. Both a and b

Explanation: also known as the matrix protein (MA), forms the matrix of the HIV virus, which surrounds the viral core.

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Correct answer: p17
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