Free Acellular Life MCQs with Answers

• A. Type of lymphocytes
• B. Present in blood and work as the defence system
• C. They kill the foreign invader
• D. All of these options are correct

Explanation: A type of white blood cell, T-cells are part of the immune system and develop from stem cells in the bone marrow.

• A. The virus is highly mutated
• B. The vaccine is too expensive
• C. The virus can be controlled through change in hygiene
• D. None of these

Explanation: Option A is correct since HIV can be mutated very rapidly and numerous strains of HIV exist.

• A. 1986
• B. 1980
• C. 1992
• D. 1970

Explanation: The term "HIV" (Human Immunodeficiency Virus) was coined in 1986. However, it's important to note that the virus itself was discovered…

• A. Replicase
• B. Reverse transcriptase
• C. Transcriptase
• D. Reverse replicase

Explanation: The replication of the HIV (Human Immunodeficiency Virus) nucleic acid depends on the activity of the enzyme reverse transcriptase.

• A. The virus is highly mutated.
• B. The vaccine is too expensive.
• C. The virus can be controlled through change in hygiene.
• D. None of these options is correct.

Explanation: Efforts to develop an HIV vaccine have been hampered by the genetic diversity of the virus itself.

• A. RNA polymerase I
• B. DNA polymerase II
• C. Reverse Transcriptase I
• D. Reverse Transcriptase

Explanation: When HIV RNA enters the cell it must be "reverse transcribed" into proviral DNA before it can be integrated into the DNA of the host cell.

• A. Simian Imunodeficiency Virus
• B. Silurian Imunodeficiency Virus
• C. Siberian Imunodeficiency Virus
• D. Both A and C

Explanation: Simian immunodeficiency viruses (SIV) are members of the Lentivirus genus of Retroviruses that infect nonhuman primates such as monkeys…

• A. Lymphocytes
• B. Cancer cells
• C. Stem cells
• D. T lymphocytes

Explanation: HIV primarily targets a type of cell in the immune system called the CD4+ T cell.

• A. Safe and protected lifestyle
• B. Use of sterile injections and needles
• C. Use of available vaccines
• D. Safe blood transfusion methods

Explanation: There is no vaccine currently available to offer protection against AIDS caused by HIV.

• A. Rodents
• B. Fowls
• C. Cats
• D. All of these

Explanation: d) All of these:The correct answer is d) All of these. Retroviruses have been identified to cause diseases in rodents, fowls, and cats.

• A. Rhabdo Virus
• B. Reo Virus
• C. Parvo Virus
• D. Rhino Virus
• E. Herpes Virus

Explanation: Explanation for this question will be added soon.

• A. DNA and RNA
• B. DNA
• C. RNA
• D. DNA or RNA

Explanation: Option D is correct since viruses can store decoded information ( genetic information ) to a limited extent.

• A. Adenovirus
• B. Pox virus
• C. Influenza virus
• D. Herpes virus

Explanation: Infection with herpes simplex virus (HSV), known as herpes, is common globally.

• A. Envelope
• B. DNA
• C. Capsid
• D. Tail Fibers

Explanation: All viruses contain nucleic acid, either DNA or RNA, and a protein coat, which encases the nucleic acid i.e. a capsid.

• A. DNA
• B. RNA
• C. Both a and b
• D. Proteins

Explanation: The genetic material of plant viruses mostly consists of option B: RNA.Explanation:A) DNA: While some viruses, such as certain…

• A. They are cuboidal in shape
• B. They are enveloped by host plasma membrane
• C. They do have enzyme reverse transcriptase
• D. All of them are not specific

Explanation: The first option is correct: Retroviruses are not cuboidal in shape. Retroviruses are actually spherical or roughly spherical in shape.

• A. HIV
• B. Hepatitis
• C. Measles
• D. Influenza

Explanation: FACT: Influenza is a viral disease and is caused by RNA enveloped virus, called the influenza virus.

• A. Spring shape
• B. Rod shape
• C. Comma shape
• D. Spherical shape

Explanation: This is factual recall from the chapter of acellular life which states that TMV is a helical virus that appears rod shaped so option B is…

• A. Entry
• B. Assembly
• C. Uncoating
• D. Adsorption or Attachment

Explanation: Viral infections follow similar steps in the virus replication cycle: attachment or adsorption, penetration, uncoating, replication…

• A. Viruses have their own ribosomes for protein formation.
• B. New viral ribosomes are formed after viral DNA enters the cell.
• C. Viruses do not need ribosomes for protein formation.
• D. Viruses use the host ribosomes for their own requirements.

Explanation: Viruses are nonliving outside the host cell. When they enter the host cell they use the machinery of the host cell for their replication.