Determine which of the following best describes these two statements:a. Growth factor receptors employ kinase activated intracellular signalling cascades to activate transcription factors and gene transcription.b. Transcription factors can be directly activated by cortisolQuestion 5Select one:a.statements a and b are both falseb.statements a and b are both truec.statement a is true and statement b is falsed.statement b is true and statement a is false
Question
Determine which of the following best describes these two statements:a. Growth factor receptors employ kinase activated intracellular signalling cascades to activate transcription factors and gene transcription.b. Transcription factors can be directly activated by cortisolQuestion 5Select one:a.statements a and b are both falseb.statements a and b are both truec.statement a is true and statement b is falsed.statement b is true and statement a is false
Solution
The correct answer is b. Statements a and b are both true.
Statement a is true because growth factor receptors do indeed use kinase activated intracellular signalling cascades to activate transcription factors and gene transcription. This is a common mechanism of signal transduction in cells, where the binding of a growth factor to its receptor triggers a cascade of intracellular events, leading to the activation of transcription factors and the transcription of specific genes.
Statement b is also true. Cortisol, a steroid hormone, can directly activate transcription factors. Steroid hormones like cortisol can pass through the cell membrane and bind to their specific receptors in the cytoplasm. The hormone-receptor complex then moves into the nucleus, where it can directly interact with DNA and activate transcription factors, leading to the transcription of specific genes.
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