Discussion
What is the range of minimum set of genes required for life?
Answer: B
Correct answer: 250-350 genes
Comparisons of the smallest genomes, together with experiments knocking genes out one at a time, put the minimum for an independently replicating cell at around 250 to 350. The figure is not fixed, since what is essential depends on how rich the environment is, but it is far below the few thousand a free-living bacterium carries.
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