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Which of the following bacterial genera shows gas vacuoles?

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Important Questions on Microbiology

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Colicins are produced by
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Sex pili in bacteria differ from fimbriae in
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The cell organelle found in the protoplasm of bacteria is
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The genes for antibiotic resistance are located in
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In Chromatium bacteriochlorophyll pigments are located in:
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Read the following statements
A) Slime layer is a loose sheath
B) Capsule is a thick and tough layer
C) Capsule protects the bacteria against desiccation.
D) Gummy and sticky character of the bacteria is due to presence of glycocalyx, present between cell and cell membrane.
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Identify the correct statements -
A) Bacterial flagella do not show 9+2 configuration in their ultra structure.
B) Bacterial flagella composed of both proteins and carbohydrates.
C) All the cocci and bacilli are non-motile.
D) Flagellar movement in bacteria is rotation.
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Identify the incorrect statement:

I) Pili is found in E. coli.
II) Teichoic acid is absent in Gram-ve bacteria.
III) Mesosomes increase the absorption of the nutrients in Gram-ve bacteria.

IV) Spherical shaped bacteria do not form chains.