Practice Questions

Viruses are unique from bacteria because they have the ability to:

A. Reproduce

B. Crystallize ✓

C. Mutate

D. Metabolize

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Jun 24, 2026

Which of the following is NOT a component of a typical virus?

A. Capsid

B. Genetic material

C. Nucleus ✓

D. Envelope

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Jun 24, 2026

The viral envelope is primarily derived from:

A. Host cell membrane ✓

B. Viral genome

C. Capsid proteins

D. Ribosomes

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Jun 24, 2026

Which viral shape is characterized by a long tube or rod-like structure?

A. Icosahedral

B. Spherical

C. Helical ✓

D. Complex

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Jun 24, 2026

Bacteriophages that induce immediate bacterial cell lysis are called:

A. Temperate phages

B. Lysogenic phages

C. Virulent phages ✓

D. Prophages

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Which of the following structures aids a virus in attaching to host cells?

A. Nucleus

B. Lipid envelope

C. Glycoproteins ✓

D. Ribosomes

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The subunits that make up the viral capsid are known as:

A. Nucleoids

B. Capsomeres ✓

C. Spikes

D. Peplomers

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Tobacco Mosaic Virus (TMV) is an example of a:

A. DNA virus

B. RNA virus ✓

C. Bacteriophage

D. Enveloped virus

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Which enzyme is used by retroviruses to convert RNA into DNA?

A. Integrase

B. Protease

C. Reverse transcriptase ✓

D. DNA polymerase

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Jun 24, 2026

Which of the following is the primary criterion used for classifying viruses?

A. Host specificity

B. Genetic material ✓

C. Mode of transmission

D. Shape of capsid

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