EVERYDAY SCIENCE

Detailed explanation-1: -A bacteriophage is a virus that infects bacteria The capsid of a bacteriophage can be icosahedral, filamentous, or head-tail in shape.

Detailed explanation-2: -In general, the shapes of viruses are classified into four groups: filamentous, isometric (or icosahedral), enveloped, and head and tail. Filamentous viruses are long and cylindrical. Many plant viruses are filamentous, including TMV (tobacco mosaic virus).

Detailed explanation-3: -Virus particles come in a wide range of sizes and shapes. Viruses may also be classified according to the structure of the virus particle, or virion. The three major shapes seen are spherical, filamentous, and complex.

Detailed explanation-4: -Virus capsids predominantly come in two shapes: helical and icosahedral. The helix (plural: helices) is a spiral shape that curves cylindrically around an axis. It is also a common biological structure: many proteins have sections that have a helical shape, and DNA is a double-helix of nucleotides.