Viral envelope contains
(4) all of these
(4) A virus is a small particle that infects cells in biological organisms. Viruses are obligate intracellular parasites; they can reproduce only by invading and taking over othe cells as they lack the cellular machinery for self reproduction.
Viral envelope is a loose membranous covering that occurs in some animal viruses, rarely plant and bacterial viruses. In contrast to enveloped viruses, the viruses without an envelope are called naked. Envelope consists of proteins from (virus), lipids and carbohydrates (from host). It has subunits called peplomeres. Surface of envelope can be smooth or have outgrowths called spikes. Common enveloped viruses are HIV, herpes virus, vaccinia virus, etc.