EVERYDAY SCIENCE

Detailed explanation-1: -An individual virus is called a virion. It is a tiny particle much smaller than a prokaryotic cell. Because viruses do not consist of cells, they also lack cell membranes, cytoplasm, ribosomes, and other cell organelles. Without these structures, they are unable to make proteins or even reproduce on their own.

Detailed explanation-2: -Viruses are even smaller than bacteria. They aren’t even a full cell. They are simply genetic material (DNA or RNA) packaged inside of a protein coating. They need to use another cell’s structures to reproduce.

Detailed explanation-3: -Viroids, virusoids and prions are subviral pathogens smaller than the virus.

Detailed explanation-4: -The smallest of viruses are about 20 nm in diameter, although influenza and the human immunodeficiency virus have a more typical size, about 100 nm in diameter. Average human cells are 10–30 m (microns) in diameter, which means that they are generally 100 to 1000 times larger than the viruses that are infecting them.

Detailed explanation-5: -Viruses contain only nucleic acids in the form of DNA or RNA but lack other cellular organelles. They are microscopic and are 20-200 nm in size. The largest virus is smaller compared to the smallest bacteria. The size of a cell ranges from 1 to 10 millimeters.