Exam 20: The Diversity of Prokaryotes and Viruses

You discover a new particle. It has only RNA as a nucleic acid and lacks both a membrane and cytoplasm. This particle is a(n)

Antibiotics can be effective only against a

In bacteria, the small, circular pieces of DNA that are located outside the chromosome are called

Through which process are bacteria able to exchange genetic material?

The causative agents of bubonic plague, which killed 100 million people during the 14th century, were

What differentiates gram- positive bacteria from gram- negative bacteria?

Bacterial endospores are used for

Avocado sunblotch is caused by a

Because viruses have limited genetic material, their mutation rates are very low.

AIDS is caused by a

All bacteria are harmful to humans.

Viroids

Tetanus is caused by bacteria that grow in deep puncture wounds.

The classifications gram- positive and gram- negative are based on of the bacterial cell wall.

Which of the following plants contains nitrogen- fixing bacteria in its root nodules?

The common cold is caused by a

Which of the following is a normal inhabitant of a cow's digestive tract that can cause harm to people when it contaminates ground beef?

What do the sticky layers of protective slime produced by some bacteria enable them to do?

A particle that lacks all organelles and must always reproduce as an intracellular parasite is a(n) _.

Unlike aerobic prokaryotes, anaerobic prokaryotes can obtain energy when is not available.