Q. No.Which organisms are responsible for the production of biogas?
(1) Archaebacteria
(2) Eubactetia
(3) Mycoplasma
(4) Protists
(1) Archaebacteria
(2) Eubactetia
(3) Mycoplasma
(4) Protists
The characteristic feature of eubacteria is -
(1) Rigid cell wall
(2) Flagellum in motile ones
(3) Chlorophyll a
(4) all of these
Cyanobacteria do not possess which feature?
(1) Unicellular
(2) Colonial or filamentous
(3) Form blooms in polluted water bodies
(4) Only marine algae
The specialised cells to fix atmospheric nitrogen is called as
(1) Heterocyst
(2) Heterocyte
(3) Heterocoem
(4) Heterolog
Find the incorrect match.
(1) Heterocyst-Archaebacteria
(2) Gelatinous sheath- BGA
(3) Methanogen- Biogas
(4) Chlorella- protista
Which of the following is correct with respect to heterocyst
(1) Nostoc, Anabena
(2) Only Anabena
(3) Nostoc
(4) All eubactetia
Chemosynthetic autotrophic bacteria does not help in recycling of
(1) Nitrogen
(2) Iron
(3) Sulphur
(4) Mangnese
Chemosynthetic bacteria does not use which inorganic substrate?
(1) Nitrites
(2) Nitrates
(3) Chlorides
(4) Both a and b
Chemosynthetic autotrophs derive energy by
(1) By sunlight
(2) By oxidation of inorganic substances
(3) By reduction of inorganic substances
(4) By reduction followed by oxidation of inorganic substances
The majority of heterotrophic bacteria are
(1) Decomposers
(2) Autotrophs
(3) Lithotrophs
(4) Organotrophs
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