Biology, 09.01.2020 22:31 trapqueenriz12
"tryptophan self-controls its synthesis." justify this statement.
a. if a lesser amount of tryptophan is present in a cell, tryptophan acts as an inducer and binds to a repressor, leading to the synthesis of enzymes required for its production and thus its synthesis.
b. if an excess amount of tryptophan is present in a cell, tryptophan acts as a promoter, preventing the further synthesis of necessary enzymes for its production and thus its synthesis.
c. if an excess amount of tryptophan is present in a cell, tryptophan acts as a co-repressor, preventing the further synthesis of necessary enzymes for its production and thus its synthesis.
Answers: 2
Biology, 21.06.2019 18:20
You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone
Answers: 2
Biology, 21.06.2019 18:30
Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water
Answers: 3
Biology, 22.06.2019 01:00
Loss of protected health information collected for research should be directly reported to:
Answers: 2
Biology, 22.06.2019 04:00
Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone
Answers: 2
"tryptophan self-controls its synthesis." justify this statement.
a. if a lesser amount of try...
a. if a lesser amount of try...
Mathematics, 01.01.2020 16:31
History, 01.01.2020 16:31
Health, 01.01.2020 16:31
Biology, 01.01.2020 16:31
Computers and Technology, 01.01.2020 16:31
Chemistry, 01.01.2020 16:31
Mathematics, 01.01.2020 16:31