Understanding Viruses and Bacteria

What is the key factor in determining whether a pathogen is a virus or bacteria?

• Size under a microscope

• The symptoms it causes

• Whether it is alive or not

• How quickly it spreads

Which characteristic is NOT required for something to be considered alive?

• Maintenance of homeostasis

• Ability to reproduce

• Ability to move

• Response to stimuli

How do bacteria reproduce?

• All of the above

• Finding a mate

• Through asexual reproduction

• By infecting host cells

What role do bacteria play in the human body?

• They replace damaged cells

• They only cause diseases

• They have no role

• They help in digestion and maintaining healthy skin

What makes viruses different from living organisms?

• They respond to their environment

• They can reproduce without a host

• They cannot reproduce without a host

• They maintain homeostasis

What is a bacteriophage?

• A medicine for viruses

• A virus that kills bacteria

• A beneficial virus

• A type of bacteria

How does viral DNA affect human evolution?

• It has contributed beneficial traits

• It causes diseases

• It prevents other viruses from infecting us

• It has no effect

Why are antibiotics not effective against viruses?

• Viruses reproduce too quickly

• All of the above

• Antibiotics target living cells, which viruses are not

• Viruses are immune to antibiotics

What is the main purpose of vaccines?

• To cure diseases caused by bacteria

• To provide immunity against specific pathogens

• To boost the immune system temporarily

• To kill pathogens directly

What is antibiotic resistance?

• A type of vaccine for bacteria

• Viruses becoming resistant to antibiotics

• Bacteria evolving to survive antibiotic treatment

• The ability of humans to resist antibiotics