Which virus is complex in structure?
Correct answer: C. T4 virus
- A. Influenza virus
- B. Herpes virus
- C. T4 virus
- D. All of these
Explanation
The T4 bacteriophage is a complex virus with a highly specialized structure. Its icosahedral head houses double-stranded DNA, while the tail functions like a syringe, using a contractile sheath to inject DNA into the host. The baseplate and long tail fibers help the virus recognize and attach to E. coli, and short spikes pierce the cell wall to enable genome delivery. This intricate design makes T4 much more advanced than simple helical or icosahedral viruses, acting as a molecular machine for efficient infection.
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About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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