Bacteria Morphology
Chemotaxis is a phenomenon of

swimming away or towards of bacteria in presence of chemical compound
swimming towards a bacteria
None of these
swimming away of bacteria

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Bacteria Morphology
Porins are located in

the outer membrane of gram-negative bacteria
the peptidoglycan layer of gram-positive bacteria
the cytoplasmic membrane of both gram-negative and gram-positive bacteria
the periplasmic space of gram-negative bacteria

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