Regulation of gene expression ll

Front

Which of the following best describes the role of the TATA-binding protein (TBP) in transcription initiation?

Back

It binds to the TATA box to help position RNA polymerase II.

Front

Which of the following is not a mechanism by which transcription factors regulate gene expression?

Back

Direct binding to the RNA polymerase II enzyme.

Front

Which of the following transcription factor domains is responsible for interacting with DNA?

Back

Zinc-finger domain

Front

Which of the following best describes combinatorial control in gene expression?

Back

Multiple transcription factors combine to control the expression of a single gene.

Front

in combinatorial gene regulation, what is the primary role of co-activators in gene transcription?

Back

To facilitate the recruitment of RNA polymerase by interacting with multiple transcription factors.

Front

 In the context of combinatorial control, a mutation in which of the following regions is most likely to disrupt gene regulation by multiple transcription factors?

Back

A distant enhancer region where multiple transcription factors bind cooperatively

Front

Combinatorial control in eukaryotic cells often involves the integration of signals from different pathways. Which of the following proteins plays a key role in integrating such signals at the level of chromatin remodeling?

Back

Histone acetyltransferases (HATs)

Front

Which of the following best describes the role of a coactivator in transcriptional regulation?

Back

Enhances transcription by recruiting histone acetyltransferases (HATs) to loosen chromatin structure

Front

What distinguishes a corepressor from a coactivator in terms of their mechanism of action?

Back

Corepressors promote chromatin condensation, while coactivators promote chromatin relaxation

Front

Which of the following best describes the primary function of the Mediator complex in eukaryotic transcription?

Back

Acts as a co-activator by facilitating the interaction between transcription factors and RNA polymerase II