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What else can I help you with?
What is a membrane envelope?
All viruses lack cell membranes but some animal viruses have a membrane similar in composition to a cytoplasmic membrane surrounding their capsids called an envelope. This is a membrane envelope. Viruses that have envelopes are called enveloped virion, without the envelope they are called a nonenveloped or naked virion. The envelope is composed of a phospholipid bilayer and proteins such as glycoproteins.
Do all viruses have an envelope?
No. I don't think so.
Are viruses made of protein and lipid membranes?
A virus particle is composed of a nucleic acid that is surrounded by the capsid (which is the protective layer that is made out of protein). Some viruses can have lipid envelope however, not all viruses have a lipid envelope.
Of what material is the envelope present in some animal viruses composed?
The envelope present in some animal viruses is composed of a lipid bilayer that is derived from the host cell membrane. This lipid bilayer contains viral glycoproteins that help the virus infect host cells.
The grouping of viruses is based partly on the?
The grouping of viruses is based partly on their genetic material (DNA or RNA), mode of replication, morphology, and characteristics of their host cell. These factors help define different families, genera, and species of viruses. Additionally, viruses may also be grouped based on their structural and biochemical properties.
How are capsids and envelopes formed?
All viruses naturally have capsids that surround the nucleic acid in the central core. When they are just in this form and don't contain an envelope, they are known as naked viruses. Members of 13 of the 20 families of animal viruses possess an additional covering external to the capsid called an envelope. This envelope is a modified piece of the host's cell membrane.
What are several things used to classify viruses?
Viruses can be labeled as RNA or DNA viruses and they can be said to have an envelope or to be "naked".
What additional protective layer of protein surrounds some viruses-?
The envelope.
What supplies the envelope of enveloped animal viruses?
Hello there! The envelope of enveloped viruses come from the lipid bilayer of host cells during the budding process. Simple! 😊
What grouping of viruses is based partly?
presence or absence of an envelope.
Do all computer viruses have an envelope?
No. I don't think so.
What additional protective layer surrounds some viruses?
envelope
Which component is present in some viruses but absent in others?
Envelope
Why are lipophilic viruses easier to kill?
Lipophilic viruses require the lipid (fatty) envelope to remain active ("live"*), and the fatty layer can be destroyed by alcohol. Non-lipophilic viruses do not require this fatty envelope, and the protein layer (capsid) is more resistant to alcohol. *Note: viruses are not actually alive, they are only genetic codes with 1 or 2 (lipophilic) protective layers. Biologists call "live" viruses *active* and "dead" viruses *inactive* or *inactivated*.
What is a membrane envelope?
All viruses lack cell membranes but some animal viruses have a membrane similar in composition to a cytoplasmic membrane surrounding their capsids called an envelope. This is a membrane envelope. Viruses that have envelopes are called enveloped virion, without the envelope they are called a nonenveloped or naked virion. The envelope is composed of a phospholipid bilayer and proteins such as glycoproteins.
Is the nuclear envelope a prokaryotic cell?
No. Only prokaryotic cells possess a nucleus.
Do all viruses have an envelope?
No. I don't think so.
