Organisms affecting Human Health: แบบฝึกหัด

• 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.

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