They appear like little spheres of golf-balls, rod shaped, like tadpoles and may be polyhedral.
Viruses may consists of Viral-Genomes, Capsids, Envelopes and Tail-Fibers. Their Genomes (set of genes) may consists of a single or several molecules of DNA or RNA. The smallest viruses have only four genes while the largest have several hundreds.
The protein coat that encloses that virul genome is called a Capsid. It may be of different shapes. Capsid is made up of protein subunits called Capsomeres. The number of capsomeres is characteristic of a particular virus.
Some viruses have accessory structures called viral-envelops that help them infect their hosts. They are membranous cloaking their capsids. Bacteriophages have tail piece with Tail Fibers.
Viruses may consists of Viral-Genomes, Capsids, Envelopes and Tail-Fibers. Their Genomes (set of genes) may consists of a single or several molecules of DNA or RNA. The smallest viruses have only four genes while the largest have several hundreds.
The protein coat that encloses that virul genome is called a Capsid. It may be of different shapes. Capsid is made up of protein subunits called Capsomeres. The number of capsomeres is characteristic of a particular virus.
Some viruses have accessory structures called viral-envelops that help them infect their hosts. They are membranous cloaking their capsids. Bacteriophages have tail piece with Tail Fibers.
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