Final answer:
The true statements about macro viruses include that they are written in the same language as the host application, can only infect documents opened in the host application, and can spread through embedded macros. Regarding virus structure, capsomeres consist of capsids, and glycoproteins aid in attachment to host cells, but not all viruses have a viral membrane or contain DNA.
Step-by-step explanation:
When addressing macro viruses, the statements regarding their characteristics are as follows:
- Macro viruses are written in the same language as the host application.
- Macro viruses can only infect documents that are opened in the host application.
- Macro viruses can be spread by macros that are embedded in documents.
Considering your question regarding virus structure, let's clarify some true statements:
- The statement that all viruses are encased in a viral membrane is not true, as some viruses lack an envelope.
- The capsomere is made up of small protein subunits called capsids. This statement is true.
- It is not accurate to say that DNA is the genetic material in all viruses, as some contain RNA.
- Glycoproteins help the virus attach to the host cell. This is also true and aids in the virus's ability to infect.
Additionally, it's essential to acknowledge that viruses have diverse genetic materials; some possess DNA while others have RNA. Their replication depends on the host cell's machinery or viral proteins, with their structure featuring a nucleic acid core and a protein capsid. Some viruses also have an outer lipid envelope, which can influence their classification.