Part b - regulation of model operons the trp and lac operons are regulated in various ways. how do bacteria regulate transcription of these operons

Operon is not transcribed: lac operon: lactose absent ; trp operon: tryptophan present Operon is transcribed, but not sped up by the positive control: trp operon: tryptophan absent, lac operon: lactose present, glucose present Operon is transcribed quickly through postive control: lac operon: lactose present, glucose absent

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.