Acellular Life

Acellular Life MDCAT MCQs with answers

72 past paper MCQs from Biology unit 1, Acellular Life, across 2 topics. They are arranged topic by topic; bigger topics show a sample here and link to their full set and to study notes. Tap “Show answer” for the correct option and a short solution.

Practise as a quiz

Viruses

1.What does the term bacteriophage refer to? (MDCAT 2022)

  1. a virus that infects bacteria
  2. a bacterium that infects a virus
  3. a virus which behaves as a bacterium
  4. a combination of a bacterium and a virion
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Correct answer: (a) a virus that infects bacteria

The name means bacteria-eater, and that is what these viruses do.

2.Which of the following viruses contains single stranded DNA? (MDCAT 2022)

  1. adenovirus
  2. herpes virus
  3. parvovirus
  4. poxvirus
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Correct answer: (c) parvovirus

The parvoviruses carry a single strand of DNA.

3.How many tail fibrils are attached to the end plate of a bacteriophage? (MDCAT 2022)

  1. 2
  2. 4
  3. 6
  4. 8
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Correct answer: (c) 6

Six fibrils spread from the end plate and hold the phage to the bacterial wall.

All 48 Viruses MCQs → Viruses notes →

AIDS and HIV Infection

4.The enzymes integrase, protease and reverse transcriptase are found in which virus? (MDCAT 2022)

  1. HIV
  2. hepatitis A virus
  3. influenza virus
  4. poxvirus
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Correct answer: (a) HIV

HIV is a retrovirus, and these three enzymes are what let it copy its RNA into DNA and splice it into the host genome.

5.Which one is transmitted through infected blood and hypodermic syringes? (MDCAT 2024)

  1. HIV
  2. influenza virus
  3. morbillivirus (measles)
  4. Vibrio cholerae (cholera)
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Correct answer: (a) HIV

HIV travels in blood and body fluids, so shared needles pass it on.

6.All of the following are the modes of transmission of AIDS, EXCEPT: (KMU MDCAT 2025)

  1. Transfusion of infected blood
  2. Sharing infected needles
  3. Shaking hands with infected person
  4. Sexual contact with infected person
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Correct answer: (c) Shaking hands with infected person

HIV needs blood, semen or milk to pass; ordinary contact carries no risk.

All 24 AIDS and HIV Infection MCQs → AIDS and HIV Infection notes →

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