When presomitic mesoderm (PSM) that would ordinarily form thoracic somites is transplanted into a region in a younger embryo (caudal to the first somite) that would ordinarily give rise to cervical (neck) somites, the grafted mesoderm differentiates according to its original position and forms ribs in the neck. This phenomena is called as:

#Question id: 4374

#Unit 3. Fundamental Processes

When a repressor protein is __ (bound, unbound) to a promoter region transcription is allowed; when an activator protein is __ (bound, unbound) to a promoter transcription is ,stimulated.

#Question id: 4375

#Unit 3. Fundamental Processes

Protein X is found to bind to a certain geneʹs promoter only when substance A is not present.  The gene can be transcribed in the presence of both X and A. It is not transcribed in the presence of X alone. Protein X is a/an __. Substance A is a/an __.

#Question id: 4376

#Unit 3. Fundamental Processes

Which of the following is the correct order of binding of general transcription factors to initiate transcription at RNA polymerase II promoters?

#Question id: 4377

#Unit 3. Fundamental Processes

What is the function of TFIIH in the transcription initiation complex?

#Question id: 4378

#Unit 3. Fundamental Processes

This serves as the promoter for 70% of eukaryotic genes and typically serves as a control region for genes that are transcribed at relatively low rates.

#Question id: 4379

#Unit 3. Fundamental Processes

Bromodomains are found in chromosome-associated proteins that contribute to transcriptional activation. To facilitate this activation, the bromodomains bind to histones, specifically their lysine residues that have been post-translationally modified by: