Organisms affecting Human Health: Practice Questions

• a.

  It lacks a cell wall.

• b.

  It is always pathogenic to humans.

• c.

  It has DNA without a nucleus.

• d.

  It requires a living host cell to reproduce.

• a.

  Viruses reproduce too slowly for the antibiotics to take effect.

• b.

  Antibiotics only work on organisms that have a protein coat.

• c.

  Viruses are much larger than bacteria and cannot be absorbed by the drug.

• d.

  Antibiotics target specific bacterial structures or metabolic processes that viruses do not have.

• a.They only contain RNA, which must be converted to DNA by host cell organelles.
• b.

  They lack the cellular machinery required to synthesize proteins and replicate independently.

• c.They require the high concentrations of glucose found only inside human cytoplasm.
• d.Their protein coat is too fragile to survive the external environment for long periods.

• a.

  It contains DNA within a nucleus.

• b.

  It has a protein coat enclosing its genetic material.

• c.

  It has a cell wall made of peptidoglycan.

• d.

  It can reproduce independently outside of a host cell.

• a.

  They only include organisms with a membrane-bound nucleus.

• b.

  They can be spread through body fluids, food, and water.

• c.

  They are all destroyed by the low pH of the stomach.

• d.

  They only cause disease if they are viral in nature.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.

Write your answer out first, then check it against the worked solution.