Tryptophan is an amino acid necessary for E. coli survival and growth. E. coli contain genes coding for enzymes that synthesize tryptophan. These genes are grouped together on a segment of DNA called the tryptophan (trp) operon. Cells can use these enzymes to synthesize tryptophan when it is not present in the environment. However, when tryptophan is already present in the environment, cellular resources are shifted away from manufacturing the enzymes for tryptophan synthesis. Tryptophan binds with and activates the trp repressor, which then binds to the trp promoter and blocks RNA polymerase. Blocking RNA polymerase decreases the normal transcription rate of the operon. The tryptophan (trp) operon consists of a promoter, an operator, and 5 trp genes. What type of regulation does the trp operon exhibit? protein modification positive regulation negative regulation translational regulation
Answers: 1
Biology, 21.06.2019 19:00
What are the four basic classes of organic molecules how do they differ structurally and functionally
Answers: 1
Biology, 22.06.2019 00:00
Does masterbation affect height growth or loss of growth hormone?
Answers: 2
Biology, 22.06.2019 05:10
Which of the following is not a potential result of deforestation?
Answers: 2
Biology, 22.06.2019 15:00
How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.
Answers: 1
Tryptophan is an amino acid necessary for E. coli survival and growth. E. coli contain genes coding...
Biology, 08.03.2021 20:00
English, 08.03.2021 20:00
Physics, 08.03.2021 20:00
Mathematics, 08.03.2021 20:00
History, 08.03.2021 20:00