Describe the structure of a virus.
Viruses are acellular and much smaller than bacteria.
They contain DNA or RNA, a capsid, and some contain an envelope and envelope proteins.
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What is a capsid?
A capsid is a protective layer of protein molecules.
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In terms of virus structure, what is an envelope?
An envelope is an outer layer made up of phospholipids that is present in some viruses.
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What is the role of envelope proteins?
Envelope proteins help viruses to bind to host cells.
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Why are viruses described as acellular?
Viruses are described as acellular because they are not made up of cells.
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