AIDS spreads by physical contact, specifically through direct exchange of bodily fluids such as blood, semen, vaginal fluids, and breast milk. It can also spread through shared needles or from mother to child during childbirth or breastfeeding.
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AIDS virus, known as HIV, is a single-stranded RNA virus. It belongs to the retrovirus family and uses reverse transcriptase to convert its RNA into DNA, which integrates into the host’s genome. This integration allows the virus to replicate and ...
Enzymes are absent in viruses. Viruses lack cellular structure and do not carry out metabolic processes independently. They rely on host cells for replication and do not possess their own enzymes for metabolism.
Viruses are considered non-living because they can crystallize. Unlike living organisms, viruses are not cellular and can exist in a crystalline form outside of host cells, remaining inert until they infect a host to reproduce.
The virus grows in living cells. Viruses require a host cell to replicate and carry out their life cycle. Once inside the cell, they use the host’s machinery to reproduce and spread to new cells.
Edward Jenner discovered the smallpox vaccine. In 1796, he used material from cowpox sores to immunize a young boy against smallpox, demonstrating the efficacy of the first successful vaccine in history.
The vaccine for smallpox was developed by Edward Jenner. In 1796, Jenner used cowpox material to create immunity against smallpox, marking the first successful vaccine. This groundbreaking work laid the foundation for modern immunology.
The virus which causes hydrophobia due to dog bite is called rabies. Rabies is a viral infection transmitted through the saliva of infected animals, most commonly dogs, and affects the nervous system.
Hydrophobia, also known as rabies, is caused by viruses. Specifically, the rabies virus affects the nervous system, leading to symptoms such as fear of water and aggression. The virus is transmitted through the saliva of infected animals.
TMV is related to viruses. TMV stands for Tobacco Mosaic Virus, one of the first discovered viruses. It infects tobacco plants and other crops, causing mosaic-like patterns on leaves and stunting growth. TMV’s discovery helped advance the study of virology.