Which of the following is NOT a true statement about transcription factors?
A - Transcription factors are key regulators of gene expression
B - A transcription factor binds to a specific DNA sequence
C - Transcription factors can be activated by signalling pathways which themselves are activated by signalling molecules
D - It usually takes three or more transcription factors working together to initiate transcription of a gene
E - All of these
Answer: E - All of these