Which of the following is/are gram-negative bacteria?
a) proteobacteria
b) chlamydias
c) both a and b
d) none of them
Proteobacteria are large group of gram-negative bacteria include……..
a) photoautotrophs
b) chemoautotrophs
c) heterotrophs
d) all of these
Explanation: some proteobacteria are aerobic while some are anaerobic
Proteobacteria is divided into………sub-groups.
a) two
b) three
c) four
d) five
Explanation: Alpha, Beta, Gamma, Delta & Epsilon Proteobacteria
Which of the following proteobacteria are associated with eukaryotic host as symbiosis for nitrogen fixation?
a) alpha-proteobacteria
b) beta-proteobacteria
c) gamma-proteobacteria
d) delta-proteobacteria
Explanation: e.g. Rhizobium with the roots of leguminous plants
Which of the following proteobacteria are involved in nitrogen recycling oxidizing ammonium, producing nitrates as waste product?
a) alpha-proteobacteria
b) beta-proteobacteria
c) gamma-proteobacteria
d) delta-proteobacteria
Explanation: Gram-negative bacteria, and one of the eight classes of the phylum Pseudomonadota
Which of the following proteobacteria includes sulphur bacteria which obtain energy by oxidizing H2S instead of water?
a) epsilon-proteobacteria
b) beta-proteobacteria
c) gamma-proteobacteria
d) delta-proteobacteria
Explanation: Gammaproteobacteria is a class of bacteria in the phylum Pseudomonadota
