Practice Questions

TLS Online TPP Program

#Question id: 3913

The sigma-70 subunit

#Section 3: Genetics, Cellular and Molecular Biology

increases the affinity of the core polymerase for nonpromoter sequences.
decreases the affinity of the core polymerase for specific promoter sequences.
is responsible for transcribing many genes.
is associated with a holoenzyme, enabling the formation of more stable complexes.

More Questions

TLS Online TPP Program

#Question id: 188

#Section 2: General Biology

Active holoenzymes are formed from ________ in the presence of ________.

TLS Online TPP Program

#Question id: 190

#Section 2: General Biology

Ca++ or Mg++ are most likely to be part of ________, while Zn++ or Fe++ are present in ________.

TLS Online TPP Program

#Question id: 191

#Section 2: General Biology

The role of zinc in the mechanisms of carbonic anhydrase is to

TLS Online TPP Program

#Question id: 193

#Section 2: General Biology

An ion commonly found in metalloenzymes and which can undergo reversible oxidation and reduction is

TLS Online TPP Program

#Question id: 194

#Section 2: General Biology

Which does not return to its original form after each catalysis?

TLS Online TPP Program

#Question id: 195

#Section 2: General Biology

Vitamin C is a vitamin but not a coenzyme because it