- viruses are being tested as treatments for genetic disorders and cancer using ________________.
- Antibiotics work only against ______________________, not viruses.
- When a virus enters a cell, it can be ___________________ for years before taking over the cell.
- Scientists are researching new ways to treat and ___________________ viral diseases in humans, animals, and plants.
- Viral diseases can be difficult to treat because viruses are constantly _________________.
- Viruses cause many human _____________, such as chicken pox, influenza, HIV, and the common cold. Viruses can also affect other animals and _______________.
- After a virus replicates in the host cell, it _________ the host cell. Copies of the virus are then released into the host organism, where they can __________ other cells.
- After a virus attaches to the host cell, its DNA or _____ enters the host cell.
- Scientists are studying the link between viruses and ________________.
- When a virus infects a person, the body begins to make special proteins called ___________________.
- As viruses change, they can produce new ways to ___________ to host cells.
- The living cell that a virus infects is called a _________ cell.
- As viruses replicate, their DNA or RNA frequently _________, or changes.
- Viruses such as influenza cause symptoms soon after _________________. ________________ viruses such as HIV might not cause symptoms right away.
- ___________________ bacteria need oxygen, as humans do.
- When bacteria become ______________ to an antibiotic, a different antibiotic must be used to fight the disease.
- Some bacteria make people sick by damaging __________________.
- Only the bacteria with the mutation survive; they ____________ and become more common.
- Random ___________________ to a bacterium's DNA enable it to survive aspecific antibiotic.
- _____________________________ are used to make foods such as pickles, yogurt, cheeses, buttermilk, vinegar, and soy sauce.