Ch. 25 Quiz

Question 1

If some filamentous cyanobacteria are exposed to adverse environmental conditions, they form resistant structure called

Answer 1

Akinetes

Question 2

A bacteriophage is a type of virus that invades a bacterial cell. If, in addition to the viral DNA, a bacteriophage injects some bacterial DNA into a cell, that DNA might be incorporated into the DNA of the cell. This process is called

Answer 2

Transduction

Question 3

You have isolated a parasitic organism from a plant. Upon closer examination, you find that the organism is prokaryotic, has little DNA, and no cell wall. You would feel confident classifying that organism as a(n)

Answer 3

Mycoplasma

Question 4

Marsh plants often live in stagnant water, where the sediments may contain H2S, which is toxic to plant roots. One way these plants survive is by forming a mutually beneficial association with

Answer 4

Beggiatoa

Question 5

To maximize energy conservation with respect to nitrogen metabolism within a plant, which soil bacteria would be most advantageous?

Answer 5

Azotobacter

Question 6

If you were trying to filter-sterilize a solution, which type of organisms would give you the most problems?

Answer 6

Mycoplasmas

Question 7

Exchange of DNA between compatible bacterial cells via a pilus is

Answer 7

Conjugation

Question 8

The photosynthetic apparatus of green and purple bacteria lack photosystem (PS)II. This means that these autotrophs cannot produce

Answer 8

O2

Question 9

You have found a prokaryote in a salt pool. Tests reveal that this organisms wall lacks peptidoglycan but contains glycoproteins and polysaccharides, has unusual lipid chemistry, and is not affected by drugs that would normally inhibit the actions of ribosomes. You could conclude that this prokaryote is most likely a type of

Answer 9

Archean

Question 10

Which of the following statements about prokaryotes is incorrect?

Answer 10

They divide, sometimes quite rapidly, by the process of mitosis