1. Cocci arranged in clusters are called as -
a) Staphylococci b) Streptococci
c) Tetrads
d) Sarcina
2
2. ------ is absent in cell wall of gram negative bacteria.
a) Protein b) Techoic acid
c) Lipopolysaccharide
d) Polysaccharide
3. Nonsymbiotic nitrogen fixation is performed by ----------- spp.
a) Azotobacter b) Clostridium
c) Rhizobium d) Rhizopus
4. --------- are site for protein synthesis.
a) Ribosomes b) Mesosomes
c) Magnetosomes d) Chlorosomes
5. Discontinuous heating process for sterilization was introduced by
a) John Needham b) John Tyndall
c) Joseph Lister d) Louis Pasteur.
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