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Nataliepavon7
28.09.2019 •
Biology
True or false? regulatory and basal transcription factors regulate transcription by binding to the promoter.
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Ответ:
False
Explanation:
Transcription factors are molecules (usually proteins) that bind to DNA and regulate the transcription of the gene. So, they are gene expression regulators.
General or basal transcription factors are important for the initiation of transcription. Some of them don't bind to the DNA, but interact with RNA polymerase. Basal transcription factors are part of the transcription preinitiation complex . The whole complex binds to promoter.
Other regulatory factors such as activators and repressors bind to specific DNA sequencies. Activators bind to enhaceres in order to increase gene expression (turn on), while repressors bind to silencers and negatively regulate transcription (turn off).
Ответ:
Explanation:
The grass dried up due to exosmosis. Osmosis is movement of solvent molecules from region of higher concentration to lower concentration in presence of semi permeable membrane. Endosmosis refers to movement of solvent molecules into the cell. ... This happens because NaCl enters into cell.