NEET BIOLOGY

Detailed explanation-1: -Virus and cell size comparison. Human viruses can vary in size but are generally in the range of 20–200 nm in diameter. In comparison, bacteria are generally 2–3 M in length, and an average human cell is 10–30 M.

Detailed explanation-2: -The physically largest virus is Pithovirus sibericum, at 1.5 microns (or 1, 500 nanometers) in length [2]. Though that might seem tiny, it is larger than some bacteria, and approximately half the width of a strand of spider web silk [3].

Detailed explanation-3: -AAV is the smallest DNA virus with an average size of 20 nm.

Detailed explanation-4: -Most viruses vary in diameter from 20 nanometres (nm; 0.0000008 inch) to 250–400 nm; the largest, however, measure about 500 nm in diameter and are about 700–1, 000 nm in length.