Which of the following shows a coiled RNA strand and capsomeres?
Correct answer: B. Tobacco mosaic virus
- A. Polio virus
- B. Tobacco mosaic virus
- C. Measles virus
- D. Retrovirus
Explanation
Tobacco Mosaic Virus fits the description you provided. Tobacco mosaic virus is an RNA virus that causes tobacco mosaic disease. It has a single-stranded coiled RNA molecule as its genetic material, a part of which hangs outside the protein coat. The protein coat consists of approximately 2130 capsomeres, which are helically arranged to form a hollow cylinder of about 4 nm diameter.
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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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