Biological Classification Question 125
125. Tobacco mosaic virus is a tubular filament of size
(a) $700 \times 30 nm$
(b) $300 \times 10 nm$
(c) $300 \times 5 nm$
(d) $300 \times 20 nm$
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Answer : d
Hints & Solutions
(d) Tobacco mosaic virus is $300 nm$ long and $20 nm$ in diameter.