Studying Viruses & Prokaryotes

What term describes any living organism or particle that can cause an infectious disease?

• virus

• pathogen

• viroid

• prion

How is a virus different from a bacterium?

• A virus has both DNA and RNA; a bacterium has only DNA

• A virus cannot reproduce on its own; a bacterium can

• A bacterium has organelles; a virus doesn't

• a bacterium, can cause disease; a virus cannot

Place the following terms in order from LARGEST TO SMALLEST: bacterium, viroid, virus, prion, eukaryotic cell

(put commas between each and spell correctly please!)

Which of the following is made only of RNA?

• bacterium

• viroid

• prion

• virus

What is distinctive about prions, compared to other pathogens?

• they take over the functions of a host cell

• they bypass the host's immune system, causing disease

• they use their proteins as templates to make genetic material

• they contain no genetic material

Place a check by the following terms that are LIVING

• Bacteria

• Viruses

• Viroids

• Prions

An infectious particle made of a strand of nucleic acid surrounded by protein is a

• bacteria

• virus

• viroid

• prion

An infectious particle made only of protein is called a

• virus

• bacteria

• prion

• viroid

Which of the following are infectious RNA particles that cause disease in plants?

• viroids

• prions

• viruses

• bacteria

Which of the following are one-celled prokaryotes?

• viruses

• prions

• viroids

• bacteria