Free Viruses MCQs with Answers

• A. Pores develop
• B. Glycocalyx layer is formed
• C. Membrane is resynthesised
• D. Viral proteins are acquired

Explanation: Attachment to the host cell is mediated by virion protein(s) binding to specific host surface molecule(s).

• A. RNA
• B. Enzyme
• C. Protective protein coat
• D. All of these options are correct

Explanation: Viroids are infectious agents. They are free RNA and do not contain any cellular components.

• A. Picornavirus
• B. Parvoviruses
• C. Herpes virus
• D. Rota virus

Explanation: The smallest known virus, according to PTB, is the polio virus. Since this is not in the options, the closest answer is parvovirus because…

• A. 1918
• B. 1917
• C. 1920
• D. 1990

Explanation: The Franco-Canadian microbiologist Félix d'Herelle (1873 to 1949) is credited with the discovery of bacteriophage, a bacterial virus, in…

• A. T2
• B. T4
• C. Both A and B
• D. None

Explanation: The T4 bacteriophage is a member of the family of Myoviridae, which includes bacteriophages with a contractile tail structure.

• A. Rough endoplasmic reticulum
• B. Golgi complex
• C. Nuclear envelop
• D. All of these options are correct

Explanation: Viruses can bud at every stage in the ER-Golgi-cell membrane pathway. As the nucleocapsids assembled or in the process of being built…

• A. Satellite virus
• B. HAV
• C. HCV
• D. HIV

Explanation: Correct option is A. Satellite viruses are a polyphyletic group of viruses encoding structural components of their virions, but incapable…

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

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

• A. Complement receptor
• B. Integrin ICAM-1
• C. Acetylcholine
• D. Epidermal growth factor

Explanation: To clarify, the attachment of the rabies virus to host cells involves interactions between viral glycoproteins and specific receptors, and…

• A. ssDNA phage
• B. ssRNA phage
• C. dsDNA phage
• D. dsRNA phage

Explanation: T2 phage is more properly called Enterobacteria phage T2. It is a virulent bacteriophage which infects Escherichia coli bacteria.

• A. Lysogenic cycle
• B. Lytic cycle
• C. Both
• D. None

Explanation: Phages lave a lytic and lysogenic life cycle. In the lysogenic cycle, phages integrate their genetic material into the bacterial…

• A. Lytic Phage
• B. Lysogenic Phage
• C. Prophage
• D. Bacteriophage

Explanation: Lytic phages take over the machinery of the cell to make phage components.

• A. Bacteria
• B. Viruses
• C. Protists
• D. Protozoans

Explanation: Viruses are an exception to cell theory since they are within the boundary of living and non-living.

• A. 1990
• B. 2001
• C. 1980
• D. 1995

Explanation: The World Health Organization (WHO) declared that smallpox was completely eradicated in 1980.

• A. Cytoplasm
• B. Nucleus
• C. Microtubules
• D. Golgi complex

Explanation: There is no outer covering in such viruses and so, their nucleocapsids are assembled in the cytoplasm.

• A. HBV
• B. HAV
• C. HCV
• D. None of these

Explanation: Hepatitis C virus (HCV), is an enveloped single-stranded RNA virus which appears to be distantly related (possibly in its evolution) to…

• A. Enveloped RNA.
• B. DNA Virus.
• C. RNA tumor.
• D. Both B and C.

Explanation: b) DNA Virus: This is the correct option. Herpes simplex is caused by herpes simplex virus (HSV), which is a DNA virus.

• A. Influenza
• B. Herpes Simplex
• C. Polio
• D. Smallpox

Explanation: [A] Influenza is RNA based virus and enveloped also[B] Herpes is not caused by Enveloped RNA virus[C] Polio is caused by non-enveloped RNA…

• A. DNA virus
• B. RNA enveloped virus
• C. DNA enveloped virus
• D. RNA virus

Explanation: Influenza is caused by an enveloped RNA virus.

• A. Hepatitis
• B. Cholera
• C. Influenza
• D. Candidiasis

Explanation: Hepatitis B and Hepatitis C are blood borne diseases, which can be transferred to other individuals by blood contact.