Bacteria and Viruses

Viruses are:

• endospores

• eukaryotic

• non-living

• prokaryotic

Viruses can infect:

• bacteria

• humans

• plants

• any living thing

What do viruses need to reproduce?

• They need a host cell

• They need bacteria

• They need genetic material

• They need insulin

The process of converting nitrogen into a form plants can use is known as nitrogen:

• ammonification

• decomposition

• fixation

• formation

Disease-causing organisms are known as:

• archaea

• bacteria

• cocci

• pathogens

What protects bacterial cells?

• cell wall

• digestive enzymes

• electric impulses

• toxic chemicals

Which viral cycle kills its host cell by lysing (exploding)?

• lysogenic

• lytic

• mitosis

• S phase

What is a virus? 

• a tiny packet of genetic material in a protein coat
• a cell with a flagella
• a cell with a nucleus 

How do human diseases caused by bacteria and diseases caused by viruses react to antibiotics? 

• Neither responds to antibiotics.
• Both respond to antibiotics.
• Viral diseases respond to antibiotics; bacterial diseases do not.
• Bacterial diseases respond to antibiotics; viral diseases do not.

A tiny, nonliving particle that invades and then reproduces inside a living cell.

• host cell
• bacteria
• virus
• pathogen