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All viruses have envelopes made from cell wall proteins.
1) True
2) False

1 Answer

1 vote

Final answer:

The statement that all viruses have envelopes made from cell wall proteins is false (Option 2). Enveloped viruses do have a layer derived from the host cell's membrane, but nonenveloped viruses lack this feature.

Step-by-step explanation:

The statement "All viruses have envelopes made from cell wall proteins" is false.

While some viruses, known as enveloped viruses, do surround themselves with part of the host cell's membrane, which comprises a lipid bilayer and associated host and viral proteins, not all viruses have this envelope.

Other viruses are called nonenveloped viruses and lack this outer layer. Enveloped viruses, such as influenza and HIV, have this layer that contains virus-encoded proteins and host cell phospholipids and proteins.

The capsomere is indeed made up of small protein subunits called capsids, and glycoproteins embedded in the envelope of some viruses help them attach to host cells.

However, not all viruses are encased in a viral membrane, and DNA is not the genetic material in all viruses, as some contain RNA.

Hence, the correct answer is: false (Option 2).

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