Bacteria and Viruses Quiz 25-26

Which of the following is a structure found in all bacteria?

• Nucleus

• Cell wall

• Mitochondria

• Chloroplast

What is the genetic material of most viruses composed of?

• Only DNA

• Only RNA

• DNA or RNA

• Proteins

Which of the following best describes the main difference between bacteria and viruses?

• Bacteria are smaller than viruses

• Viruses can reproduce on their own

• Bacteria are living cells; viruses are not

• Bacteria do not cause diseases

Which type of medicine is effective against bacterial infections but not viral infections?

• Vaccines

• Antibiotics

• Antivirals

• Painkillers

What is the main purpose of a vaccine?

• To kill bacteria directly

• To strengthen the immune system against specific viruses

• To cure viral diseases instantly

• To provide nutrients to the body

Which of the following roles do bacteria play in ecosystems?

• Only cause diseases

• Decompose organic matter

• Only produce oxygen

• Only live in extreme environments

Tags

NGSS.MS-LS2-3

Which structure allows some bacteria to move?

• Capsule

• Flagellum

• Ribosome

• Nucleoid

Which process do viruses use to reproduce inside a host cell?

• Binary fission

• Budding

• Lytic cycle

• Photosynthesis

Which of the following is NOT a difference between bacteria and viruses?

• Bacteria have cell walls; viruses do not

• Bacteria can reproduce independently; viruses need a host

• Bacteria contain ribosomes; viruses do not

• Both can be treated with antibiotics

A student is given a diagram of a bacterial cell. Which feature should they look for to distinguish it from a virus?

• Presence of a protein coat

• Presence of a cell wall and ribosomes

• Presence of a lipid envelope

• Presence of DNA only