Lesson Quiz: Understanding Viruses Review

Individuals with HIV sometimes contract secondary infections that are rare in the rest of the population. This is because people with HIV

Are unable to fight off these secondary disease-causing organisms.

Some diseases are caused by bacteria, protists, invertebrates, or viruses. How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

Bacterial diseases respond to antibiotics, viral diseases do not.

Which of these is not a virus?

C

When a virus invades a host the most common threat is

Destruction of cells by viral reproduction.

Vaccination requirements vary from virus to virus. Some diseases require one vaccination that lasts for many years. Other diseases like the flu have vaccines that only lasts one season, or year. The flu vaccine lasts a short time because the flu virus

Mutates much more rapidly

Vaccines are effective in preventing disease because they

Prepare the immune system to recognize and destroy pathogens.

The Sabin vaccine was a liquid that contained weakened polio viruses. Those who have received this vaccine are protected against polio because

The weakened viruses promote production of antibodies.

The nucleic acid of a virus is made up of which of the following?

either DNA or RNA

A virus

Contains RNA or DNA in a protein coat.

Which of the following is found in both cells and viruses?

Genetic material