Free Acellular Life MCQs with Answers

• 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

• 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…

• 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.

• A. Cholera
• B. Tuberculosis
• C. Typhoid
• D. Poliomyelitis

Explanation: Option A: cholera is caused by a bacterium called Vibrio cholera (hence incorrect).

• A. HAV
• B. HBV
• C. HCV
• D. HIV

Explanation: The correct answer is HBV. HBV, also known as Hepatitis B Virus, has a single circular double-stranded DNA genome.

• A. Abundant bacteria are present
• B. Abundant water is present
• C. Abundant nutrients are present
• D. They can only live at human body temperature

Explanation: Phages can translocate through the mucosa to lymph and internal organs and play a role as regulators of the bacterial population in the…

• A. Polyhedral shape
• B. Bad shape
• C. Tadpole shape
• D. Golf ball shape

Explanation: The polio virus has a polyhedral shape, which means it is roughly spherical with many flat sides or faces.

• A. Typhoid and plague
• B. Polio and measles
• C. Cholera and rabies
• D. Mumps and influenza

Explanation: Live attenuated vaccines are designed to provoke a strong immune response by using a weakened form of the virus.

• A. tetanus
• B. small pox
• C. tuberculosis
• D. diptheria

Explanation: Smallpox is caused by a virus, the variola virus, not a bacterium. Tetanus is caused by a bacterium called Clostridium tetani.

• A. Head region
• B. Tail region
• C. Neck region
• D. Capsule region

Explanation: The phage virus uses its tail region to secrete lysozyme, an enzyme essential for breaking down the bacterial cell wall during the…

• A. Penicillin
• B. Histamine
• C. Interferon
• D. Antigens

Explanation: Interferons are a group of signaling proteins made and released by host cells in response to the presence of viruses.

• A. 50%
• B. 60%
• C. 80%
• D. 90%

Explanation: Polio, or poliomyelitis, is a disabling and potentially deadly disease. It is caused by the poliovirus.

• A. 2-6 weeks
• B. 4-10 weeks
• C. 4-20 weeks
• D. 4-26 weeks

Explanation: Hepatitis C is a viral infection that affects the liver. It causes inflammation and swelling, which damages the liver tissues over time.

• A. Hepatitis A
• B. Hepatitis B
• C. Hepatitis C
• D. Hepatitis D

Explanation: Viroids are infectious agents that consist only of naked RNA without any protective layer such as a protein coat.

• A. 1 - 2 weeks
• B. 2 - 3 weeks
• C. 3 - 4 weeks
• D. 4 - 5 weeks

Explanation: The correct answer is 2 - 3 weeks. Leaf curl disease symptoms in cotton typically become visible within this timeframe due to the…

• A. Antibodies
• B. Histamines
• C. Antigens
• D. Interferons

Explanation: The correct answer is Interferons. Interferons are proteins produced by host cells in response to viral infections.

• A. Whooping cough
• B. German measles
• C. African sleeping sickness
• D. Tay Sach's Disease

Explanation: It is also called German measles, but it is caused by a different virus than measles.

• A. Single strand RNA
• B. Double strand DNA
• C. Single strand DNA
• D. Double stranded RNA

Explanation: Influenza viruses, belonging to the Orthomyxoviridae family, have a segmented, negative-sense, single-stranded RNA genome.

• A. Hepatitis C
• B. Hepatitis B
• C. Hepatitis A
• D. Hepatitis A and B

Explanation: some viruses, such as hepatitis B and hepatitis C, can indeed cause chronic liver disease.

• A. Bacteria
• B. Algae
• C. Fungus
• D. Virus

Explanation: Meristems are devoid of viruses because they lack a vascular system. Since viruses require a host to replicate and spread, the absence of…