Questions No:1
An ammonifying bacterium is
[A] Bacillus mycoides
[B] Nitrocystis
[C] Nitrosomonas
[D] Pseudomonas aeruginosa
Questions No:2
Nitrogen fixing cyanobacterium present in fernAzolla is
[A] Nostoc
[B] Trichodesmium
[C] Anabaena
[D] Oscillatoria.
Questions No:3
Cyanophycean granules are granules of
[A] Reserve carbohydrate
[B] Reserve lipids
[C] RuBP carboxylase
[D] Reserve protein.
Questions No:4
I. Heterocysts occur in
[A] Bacteria
[B] Archaebacteria
[C] Mycoplasmas
[D] Cyanobacteria.
Questions No:5
!. Heterocysts are specialised in
[A] Nitrogen fixation under aerobic conditions
[B] Nitrogen fixation under anaerobic conditions
[C] Formation of internal hormogones
[D] Saprotrophism.
Questions No:6
Unicellular organisms that divide by binary fission are
[A] Viruses
[B] An independent group between viruses and bacteria
[C] Fungi
[D] Bacteria
Questions No:7
When bacteria are rod like, they are called
[A] Bacilli
[B] Cocci
[C] Spirilla
[D] Vibrios
Questions No:8
A cubical packet of 8 cocci is called
[A] Sarcina
[B] Spirillum
[C] Staphylococcus
[D] Vibrio
Questions No:9
The major part of cell wall of monerans (Bacteria and Cyanobacteria) is made up of a polymer called
[A] Peptidoglycan
[B] Mucopeptide
[C] Glycopeptide or murein
[D] all the above
Questions No:10
A pure (Axenic) culture is
[A] A culture of microbe having multiple copies of a single kind of microbe
[B] A culture without any contamination
[C] both (1) and (2)
[D] None
Questions No:11
Bacteria continue to live under conditions which resemble the conditions that prevailed on primitive earth, are
[A] PPLO
[B] Archaebacteria
[C] Cyanobacteria
[D] Prokaryotic bacteria
Questions No:12
Archaebacteria are
[A] heterotrophic and anaerobic
[B] chemotrophic
[C] decomposers and mineralisers
[D] all of the above
Questions No:13
Red sea is red due to
[A] red tides by Protistans
[B] red alga like Sargassum
[C] blue green alga like Trichodesmium
[D] iron salts in Gonyaulax
Questions No:14
A spiral cyanobacterium, cultivated in water tanks as protein rich food is
[A] Spirillum ‘
[B] Spirulina
[C] Nostoe
[D] Chlorella
Questions No:15
Cyanobacteria are characterised by
[A] ability to perform oxygenic photo-synthesis and absence of Nitrogenase
[B] ability to perform oxygenic photo-synthesis and presence of Nitrogenase
[C] have chlorophyll in chloroplast
[D] ability to perform anoxygenie photo-synthesis and presence of Nitrogenase
Questions No:16
Photosynthetic bacteria have pigments in
[A] chromatophores
[B] leucoplast
[C] chromoplast
[D] chloroplast
Questions No:17
Bacterial cell membrane has
[A] Chitin
[B] Cellulose
[C] proteins and phospholipids
[D] Acetyl glucosamine and muramic acid
Questions No:18
Plastids are totally absent in
[A] Fungi
[B] Blue green algae
[C] Bacteria
[D] all of these
Questions No:19
Bacteria lack
[A] Cell wall
[B] Cell membrane
[C] Ribosomes
[D] Mitochondria
Questions No:20
Circular DNA is found in
[A] Bacteria
[B] Chloroplast
[C] Mitochondria
[D] all of these