In eukaryotes, general transcription factors a. In eukaryotes, general transcription factors b. are required for the expression of specific protein-encoding genes. c. usually lead to a high level of transcription even without additional specific transcription factors. d. bind to other proteins or to a sequence element within the promoter called the TATA box. e. inhibit RNA polymerase binding to the promoter and begin transcribing. f. bind to sequences just after the start site of transcription.

b.are required for the expression of specific protein-encoding genes

Explanation:

Transcription factors are proteins that bind to enzyme RNA polymerase to aid transcription( coping of information on DNA to an intermediate mRNA.

They control the expression of a particular gene. A transcriptor can be a repressor or enhancer. A repressor when they inhibit the action of RNA polymerase by blocking it from attaching to promoter sequence or enhancer by binding to RNA polymerase to enhance transcription.

Transcriptor protein can work alone or work with other protein such as silencer.