Microbiology

Which of the following is one important difference between a virus and a bacterial cell?

A virus can never reproduce on its own, but a bacterial cell can.

How do human diseases caused by bacteria and diseases caused by viruses react to antibiotics?

Bacterial diseases respond to antibiotics; viral diseases do not.

How are parasites and viruses similar?

Both infect host organisms.

Which statement best describes influenza?

Influenza is highly contagious.

microbiology

Science that studies organisms such as viruses, bacteria and other unicellular organisms that lack tissue differentiation.

Which of these best defines communicable diseases?

They are spread to others.

Which of the following statements explains why viruses are able to reproduce only inside host cells instead of being able to reproduce on their own?

Viruses lack the cellular machinery needed to make copies of their genetic material.

What process enables the bacteria to multiply inside the body?

binary fission

How does a virus cause a person to develop a common cold?

invades the host cell to reproduce

Which of the following structures is not found in bacteria?

nuclear membrane

The Sabin vaccine is a liquid containing weakened polio viruses. Vaccinated individuals become protected against polio because the weakened viruses

promote production of antibodies.

What is accomplished by treating a person who has a bacterial infection with antibiotics?

reduction in the duration and intensity of the infection

The purpose for giving a person a vaccine is to . . .

stimulate an immune response.

Which of the following require a host cell because they are not able to make proteins on their own?

viruses