Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 3766
TLS Online TPP Program

#Question id: 3979

“Housekeeping genes” in bacteria are commonly expressed constitutively, but not all of these genes are expressed at the same level (the same number of molecules per cell).  The primary mechanism responsible for variations in the level of constitutive enzymes from different genes is that:

#Unit 3. Fundamental Processes

  1. all constitutive enzymes are synthesized at the same rate, but are not degraded equally.

  2. their promoters have different affinities for RNA polymerase holoenzyme.

  3. some constitutively expressed genes are more inducible than others.

  4. some constitutively expressed genes are more repressible than others.

More Questions
TLS Online TPP Program

#Question id: 9218

#Unit 9. Diversity of Life Forms

What strategy was used to rescue Illinois prairie chickens from a recent extinction vortex?
TLS Online TPP Program

#Question id: 28938

#Unit 7. System Physiology – Animal

Central diabetes insipidus is caused by___
TLS Online TPP Program

#Question id: 31231

#Unit 2. Cellular Organization

Mitotic spindle attach to chromosomes via specialized protein structures known as:
TLS Online TPP Program

#Question id: 11744

#Unit 6. System Physiology – Plant

Large pores in cell walls are the prominent feature of sieve elements, the sieve area pores range in diameter from
TLS Online TPP Program

#Question id: 2840

#Unit 2. Cellular Organization

An experimental setup provided the assay for identifying factors that facilitate transcription in the presence of chromatin. A factor called FACT (facilitates chromatin transcription) functions as