Flexible spiral-shaped prokaryotes are __________ .


a. spirilla
b. spirochetes
c. vibrios
d. rickettsias

For each of the following statements that is true, write “true” in the blank. For each statement that is false, write the word(s) that should be substituted for the underlined word(s) to make the statement correct.

__________ Pigments located in thylakoids in phototrophic bacteria trap light energy for metabolic processes.

For each of the following statements that is true, write “true” in the blank. For each statement that is false, write the word(s) that should be substituted for the underlined word(s) to make the statement correct.

__________ A giant bacterium that is large enough to be seen without a microscope is Selenomonas.

How is Agrobacterium used in recombinant DNA technology?

Name and describe six distinct classes of phylum Proteobacteria.

For each of the following statements that is true, write “true” in the blank. For each statement that is false, write the word(s) that should be substituted for the underlined word(s) to make the statement correct.

__________ Most cyanobacteria form heterocysts in which nitrogen fixation occurs.

Which genus is the most common anaerobic human pathogen?

a. Bacteroides

b. Spirochetes

c. Chlamydia

d. Methanopyrus