NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In general, prokaryotic genome size is linked to its metabolism and interaction with the environment. Which type of prokaryote typically has the smallest genome?
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Autotroph
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Free-living heterotroph
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Endosymbiont
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Parasite
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Explanation:
Detailed explanation-1: -In prokaryotes, genome size and gene number are strongly correlated, but in eukaryotes the vast majority of nuclear DNA is non-coding. Nevertheless, there is some overlap in genome size between the largest bacteria and the smallest parasitic protists.
Detailed explanation-2: -In prokaryotes, the genome is composed of a single, double-stranded DNA molecule in the form of a loop or circle. The region in the cell containing this genetic material is called a nucleoid. Some prokaryotes also have smaller loops of DNA called plasmids that are not essential for normal growth.
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