It is located -10 base pairs upstream of the transcription site and plays a crucial role in the initiation of transcription.

It is composed of 6 base pair sequence ''TATAAT'', which is recognized and bound by the sigma factor of RNA polymerase.

Pribnow box is located at the -35 region of bacterial promoters and is composed of six base pairs sequence of "TTGACA".

Both (a) and (b).

All of the above.