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Bacteria Morphology

Bacteria Morphology
The cooci which mostly occur in single or pairs are

Diplococci
Streptococci
Tetracocci
None of these

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Bacteria Morphology
Swimming towards a chemical of bacteria is termed as

positive chemotaxis
phototaxis
magnetotaxis
negative chemotaxis

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Bacteria Morphology
The structure responsible for motility of bacteria is

sheath
capsules
pilli
flagella

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Bacteria Morphology
Which of the following is exposed on the outer surface of a gram-negative bacterium?

Electron transport system components
Braun lipoprotein
O-antigen of lipopolysaccharide (LPS)
Polysaccharide portion of lipoteichoic acid (LTA)

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Bacteria Morphology
The cell walls of many gram positive bacteria can be easily destroyed by the enzyme known as

lipase
peroxidase
pectinase
lysozyme

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Bacteria Morphology
In eukaryotic cells, ribosomes are

80S
70S
Not specific
60S

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