Acellular Life (Viruses) MCQs

Correct answer B. Shaking hands or sharing cups with an infected person

Correct answer B. Across the placenta, at birth or through breast milk

Correct answer A. Their helper T cell count falls so low that immune responses fail

Correct answer D. bacteriophages

Correct answer C. capsomeres

Correct answer C. From the host cell membrane during budding

Correct answer D. Helical (rod-shaped)

Correct answer B. polyhedral (icosahedral)

Correct answer D. Complex

Correct answer D. Single-stranded RNA

Correct answer B. Rotavirus

Correct answer B. single-stranded DNA

Correct answer C. A virus contains either DNA or RNA, never both

Correct answer B. RNA

Correct answer B. lack cellular organisation and their own metabolic machinery

Correct answer D. the fit between viral attachment proteins and receptors on the host cell surface

Correct answer C. W. M. Stanley

Correct answer D. passed through filters that held back bacteria

Correct answer D. an electron microscope

Correct answer C. They lack enzymes and ribosomes needed for metabolism and protein synthesis