Bacteria and Virus Review

The projections on the surface of a virus help with what?

• moving into the cell
• attaching to a host cell
• signaling other viruses to the host cell
• controlling the host cells DNA

If a company wants to create an antiviral drug what would be one of the most important things to research first?

• what process the virus uses to infect host cells
• if the virus is closely related to cold viruses
• the metabolism of a the virus
• meiosis in the virus

If a virus infects an individual and symptoms begin within two to seven days, what type of reproduction cycle does this type of virus have?

• lysogenic, because the virus is small
• lytic, because the virus causes certain symptoms
• lysogenic, because the virus primarily affects older people
• lytic, because  of the quick onset of symptoms after infection

The best way to identify a bacteria cell is

• single-celled, no nucleus
• single-celled, nucleus
• single-celled, cell wall
• single-celled, large vacuole

Tags

NGSS.MS-LS1-1

A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following?

• The virus produces toxins that weaken immune cells and prevent them from reproducing.
• The virus damages immune cells while using their machinery to produce copies of itself.
• The virus uses nutrients meant for immune cells to fuel its own cellular respiration. 
• The virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally.

Some fungi secrete substances that are toxic to bacteria that compete with them for food. Scientists have used their knowledge of this ability of fungi in order to produce which of the following substances?

• Yogurt
• Fertilizer
• Plastic
• Antibiotics

Which of the following statements is true about the relationship of human DNA and bacteria DNA?

• DNA replication is the same in bacteria and humans.
• Bacteria cells contain the same organelles as human cells.
• The basic components of DNA are the same in humans and bacteria.
• Bacterial cells and human cells contain the same kind of chromosomes.

Which of the following can be found in both cells and viruses?

• Silica
• Genetic material
• Digestive cavity
• Flagella

The best way to combat a viral infection with a drug would be to

• stop the virus from entering cells
• stop the virus from reproducing
• stop the virus from performing respiration
• destroy the viruses organelles

Scientist believe viruses are non-living which of these supports their stance?

• Viruses replicate to create more viruses
• Viruses contain DNA
• Viruses need a host cell to reproduce
• Viruses reproduce