Last one. Why might it be beneficial for a prokaryote to have the ability to regulate expression of particular genes, rather than just express all genes all the time?

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love_to_love_you · Answer

@DJPatrickStar

anonymous · Answer

For prokaryotes, most regulatory proteins are negative and therefore turn genes off. It is beneficial by:
Vary the numbers of specific enzymes made (regulation of gene expression)
Slow, but can have a dramatic effect on metabolic activity
Regulate enzymatic pathways (feedback inhibition, allosteric control)
Rapid and can be fine-tuned, but if the enzyme system does not have this level of control, then it is useless
Prokaryotes are "simple," single celled organisms, so they have "simple" systems
Genes are grouped together based on similar functions into functional units called operons
MANY GENES UNDER ONE CONTROL!!!
There is one single on/off switch for the genes