3IE Bacteria and Viruses

One difference between bacteria and viruses is-

• bacteria respond to stimuli; viruses do not

• bacteria are living organisms; viruses are not.

• bacteria require a host cell to reproduce; viruses do not.

• viruses are composed of cells; bacteria are not

Which of the following best describes the difference between the genetic material of viruses and bacteria?

• The genetic material of viruses is located on multiple chromosomes, while bacteria have only one.

• The genetic material of viruses always includes both DNA and RNA, while bacteria only have DNA

• Viruses have less genetic material and fewer genes than bacteria.

• The genetic material of viruses is coiled, whereas the genetic material of bacteria is linear.

AIDS, influenza, and Ebola are examples of diseases caused by microbes called–

• viruses

• parasites

• bacteria

• fungi

Bacteria are called ____________________ because their genetic material is not contained in nuclei.

• carbohydrates

• proteins

• eukaryotes

• prokaryotes

Viruses are considered nonliving because they-

• cannot multiply

• use energy to grow

• are smaller than bacteria

• do not show all of the characteristics of life

Bacteria have short, fine, hairlike appendages called ______

• plasmids

• flagella

• spirillia

• fimbriae

An antibiotic is a drug that selectively kills ______________.

• viruses

• bacteria

• fungi

• all of the above

Which statement is true about viruses?

• Viruses can eat and metabolize food.

• Viruses can reproduce only using a host cell.

• Viruses can reproduce on their own at any time.

• Viruses contain DNA, so they are alive.

One of the differences between bacteria and viruses is that

• viruses are living and bacteria are non-living

• bacteria are living and viruses are non-living

• viruses are biotic and bacteria are abiotic

• viruses are prokaryotic and bacteria are eukaryotic

Why are viruses like parasites?

• They make their own food

• They use their own energy to develop

• They multiply

• They harm the cells they enter