BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -A virus is made up of a DNA or RNA genome inside a protein shell called a capsid. Some viruses have an external membrane envelope. Viruses are very diverse. They come in different shapes and structures, have different kinds of genomes, and infect different hosts.
Detailed explanation-2: -Viruses are smaller and simpler in construction than unicellular microorganisms, and they contain only one type of nucleic acid-either DNA or RNA-never both.
Detailed explanation-3: -A capsid is the protein shell of a virus, enclosing its genetic material. It consists of several oligomeric (repeating) structural subunits made of protein called protomers. The observable 3-dimensional morphological subunits, which may or may not correspond to individual proteins, are called capsomeres.
Detailed explanation-4: -The simplest physical object in biology, a virus consists of a protein shell called the capsid, which protects its nucleic acid genome-RNA or DNA. Viruses can be thought of as mobile containers of RNA or DNA that insert their genetic material into living cells.
Detailed explanation-5: -So, the correct answer is ‘They are obligate intracellular parasites’.