A virus is a small infectious agent that requires a host cell to replicate. It consists of genetic material (DNA or RNA) surrounded by a protein coat. Viruses are not considered living organisms because they cannot carry out metabolic processes on their own.
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A basic characteristic of a virus is that it cannot survive or reproduce on its own. It requires a host cell to replicate and multiply.
A virus is a microscopic infectious agent consisting of genetic material surrounded by a protein coat. It is unable to replicate on its own and requires a host cell to multiply.
Measles is an acute highly contagious infection caused by the rubeola virus. It can be transmitted through respiratory droplets from coughing and sneezing. Symptoms include fever, cough, runny nose, and a characteristic red rash.
The parotid gland is infected when one has the mumps. The virus leads to inflammation and swelling of the parotid glands, causing characteristic jaw and face swelling.
The section of the chromosome that carries the information for a specific characteristic is called a gene. Genes are the basic unit of heredity and encode the instructions for producing proteins that determine traits in an organism.