Bacteria (singular is bacterium) are one celled living organisms with complete genetic ‘codes’ made up of DNA and RNA. A virus is a section of DNA or RNA enclosed by a protein shell. Bacteria are over 100 times larger than viruses, but both can still only be seen by using a microscope.
In this regard, what is the size of bacteria and viruses?
There are key differences between bacteria and viruses in size, origins, and effects on the body. Viruses are the smallest and simplest life form; they are 10 to 100 times smaller than bacteria. Bacteria are single-celled organisms that can live either inside or outside other cells.
Are virus alive?
Viruses are not living things. Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.
Can bacteria reproduce on their own?
However, this is not to say that bacteria and viruses have the same reproductive strategies. Bacteria practice asexual reproduction. To reproduce, a bacteria replicates its own DNA, elongates, and splits into two daughter cells. Each daughter cell gets one copy of the DNA, making them clones (exact copies).