Which of the following proteobacteria includes the slime-secreting myxobacteria and are attached to other bacteria?
a) epsilon-proteobacteria
b) beta-proteobacteria
c) gamma-proteobacteria
d) delta-proteobacteria
Which of the following proteobacteria are pathogenic mostly and cause diseases in humans and animals?
a) alpha-proteobacteria
b) epsilon-proteobacteria
c) gamma-proteobacteria
d) beta-proteobacteria
Explanation: Campylobacterota are a phylum of bacteria. All species of this phylum are Gram-negative.
Which of the following group of bacteria are parasitic gram-negative bacteria and cause some common diseases in humans?
a) cyanobacteria
b) all proteobacteria
c) chlamydias
d) delta-proteobacteria
Which of the following group of bacteria are helical heterotrophs spiral through their environment by means of rotating internal filaments?
a) cyanobacteria
b) all proteobacteria
c) chlamydias
d) spirochetes
Explanation: many are free living and some but other are notorious parasites of human race
Which of the following group of bacteria contain both solitary and colonial forms, actinomycetes?
a) spirochetes
b) all gram-negative bacteria
c) chlamydias
d) gram-positive bacteria
Explanation: cause TB and leprosy
Which of the following group of bacteria are cultured as source of many antibiotics including streptomycin?
a) spirochetes
b) all gram-negative bacteria
c) chlamydias
d) gram-positive bacteria
Explanation: The staining method uses crystal violet dye, which is retained by the thick peptidoglycan cell wall found in gram-positive organisms.
