TLS Online TPP Program

#Question id: 3041


Which statement about gram-negative bacteria is correct?

#Unit 2. Cellular Organization
  1.  Penicillins are the best antibiotics to use against them.

  2. They often possess an outer membrane containing toxic lipopolysaccharides.

  3. Their chromosomes are composed of DNA tightly wrapped around large amounts of histone proteins.

  4. Their cell walls are primarily composed of peptidoglycan.

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TLS Online TPP Program

#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.

TLS Online TPP Program

#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 __.

TLS Online TPP Program

#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?

TLS Online TPP Program

#Question id: 4377

#Unit 3. Fundamental Processes

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

TLS Online TPP Program

#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.

TLS Online TPP Program

#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: