True : A virus must infect a living host cell to reproduce. Viruses cannot replicate on their own because they lack the necessary cellular machinery. They must hijack a host cell's machinery to produce new virus particles.
False : Viruses do not have a hard time entering the body due to their size. They can easily enter the body through various pathways such as respiratory droplets, contact with infected surfaces, or bites from insects.
False : The two types of viruses are not "common" and "uncommon". Viruses are typically categorized based on their genetic material as DNA or RNA viruses. Other classifications include their shape, replication method, and the type of host they infect.
True : The two categories of antiviral drugs are "antiviral" and "antiretroviral". Antiviral drugs are used to treat viral infections in general, while antiretroviral drugs are specifically used for treating retrovirus infections like HIV.
True : Most nonretroviruses must invade the body in large numbers to cause disease. A single virus is often insufficient to overcome the immune system and cause noticeable disease.
False : A virus that is stronger and persists in the body is said to have more virulence, not less. Virulence is the severity or harmfulness of a disease.
False : Antiviral drugs are not virucidal and do not work by directly killing viruses. Instead, they inhibit a virus's ability to replicate or spread, thereby aiding the immune system in controlling the infection.
True : Antiviral drugs work by either suppressing viral reproduction or preventing viruses from releasing their genetic material. For example, some drugs inhibit enzyme activities necessary for viral replication, while others prevent the release of viral DNA or RNA into host cells.