Microbiology Tutorial 1 Y1B3

ID50 or ID50  is the dose of bacteria, viruses, or other infective agents that produces death in 50% of the test objects

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A reservoir and can either be animate such as human or animal but not inanimate such as water or soil

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Gram-positive cells have an outer membrane outside their cell walls

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Peptidoglycan consists of long polysaccharide chains cross-linked with amino acids.

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Temperate phages in lysogenic cycle cause bacterial cell lysis

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A frameshift mutation occurs following the deletion of one base in the reading frame

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The oriC simultaneously generates two DNA replication forks during bacterial cell multiplication

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In bacterial transformation, fragments of exogenous DNA are taken up and incorporated into the genome

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After ultraviolet exposure, the bacterial genome undergoes self-repair by excising thymine dimers.

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Facultative anaerobes use oxygen if available for aerobic respiration

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