Asked in PMC Practice Test 28 (2021) 2021

What is the shape of the TMV Virus?

Correct answer: A. Rod

  • A. Rod
  • B. Spherical
  • C. Tadpole
  • D. Helical

Explanation

The shape of TMV virus is rod-shaped or filamentous. TMV stands for Tobacco Mosaic Virus, and it is a type of virus that infects plants, particularly tobacco plants. The virus consists of a long, cylindrical structure that is made up of many copies of a single protein molecule that wrap around a single strand of RNA. The RNA contains the genetic information that the virus uses to replicate and produce more virus particles. The rod-shaped or filamentous shape of the virus is important for its ability to infect and move through plant tissues. The shape allows the virus to move efficiently through the narrow spaces between plant cells, and it also helps it to evade the plant's immune system.

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