Difference between bacteria and viruses
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Posted by Mayank Kumar 6 years, 5 months ago
- 2 answers
Yogita Ingle 6 years, 5 months ago
S.N. |
Characteristics |
Bacteria |
Viruses |
| 1 | Size | Larger (1000 nm) | Smaller (20-400 nm) |
| 2 | Cell Wall | Peptidoglycan or Lipopolysaccharide | No cell wall. Protein coat present instead. |
| 3 | Ribosomes | Present | Absent |
| 4 | Number of cells | One cell (Unicellular) | No cells |
| 5 | Living/Non-Living | Living organisms | Between living and non-living things. |
| 6 | DNA and RNA | DNA and RNA floating freely in cytoplasm. | DNA or RNA enclosed inside a coat of protein. |
| 7 | Infection | Localized | Systemic |
| 8 | Reproduce | Able to reproduce by itself | Need a living cell to reproduce |
| 9 | Reproduction | Fission- a form of asexual reproduction | Invades a host cell and takes over the cell causing it to make copies of the viral DNA/RNA. Destroys the host cell releasing new viruses. |
| 10 | Duration of illness | A bacterial illness commonly will last longer than 10 days. | Most viral illnesses last 2 to 10 days. |
| 11 | Fever | A bacterial illness notoriously causes a fever. | A viral infection may or may not cause a fever. |
| 12 | Cellular Machinery | Possesses a cellular machinery | Lack cellular machinery |
| 13 | Under Microscope | Visible under Light Microscope. | Visible only under Electron Microscope. |
| 14 | Benefits | Some bacteria are beneficial (Normal Flora) | Viruses are not beneficial. However, a particular virus may be able to destroy brain tumors. Viruses can be useful in genetic engineering. |
| 15 | Treatment | Antibiotics | Virus does not respond to antibiotics. |
| 16 | Examples | Staphylococcus aureus, Vibrio cholerae, etc | HIV, Hepatitis A virus, Rhino Virus, etc |
| 17 | Diseases/Infections | Food poisoning, gastritis and ulcers, meningitis, pneumonia, etc | AIDS, common cold, influenza, chickenpox, etc |
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Sia ? 6 years, 5 months ago
Bacteria: Bacteria are single- celled microscopic organisms. They can survive under all types of environment, ranging from ice cold climate to hot springs and deserts to marshy lands. Bacteria always live in colonies. They are of spiral shape or rod shape. Bacteria play important role in our life; some bacteria are useful whereas some other are harmful and cause diseases. Bacteria are involved in making of cheese and pickles. Lactobacillus bacteria promote the formation of curd. Antibiotics are also made from bacteria. Apart from this diseases like tuberculosis and typhoid are caused due to bacteria.
Viruses: Viruses are microscopic infectious agent that acts as non-living outside host cell and inside host cell it becomes living and show reproduction. It can affect all kind of organism including animals, plants and bacteria. Common ailments like cold, coughs and influenza (flu) are caused by viruses; serious diseases like chicken pox and polio are also caused by viruses.
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