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TLS Online TPP Program

#Question id: 11197

After the depolarization phase of an action potential, the resting potential is restored by ________.

#Unit 7. System Physiology – Animal
  1. the opening of voltage-gated potassium channels and the inactivation of sodium channels
  2. a decrease in the membrane's permeability to potassium and chloride ions
  3. a brief inhibition of the sodium-potassium pump
  4. the opening of more voltage-gated sodium channels
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TLS Online TPP Program

#Question id: 3858

#Unit 3. Fundamental Processes

The 5' methyl guanosine caps added during RNA chain elongation performs what function?

1. prevents degradation by nucleases 

2. are recognized by protein factors

3. are used to identify the type of RNA
TLS Online TPP Program

#Question id: 3859

#Unit 3. Fundamental Processes

Polyadenylation is:
TLS Online TPP Program

#Question id: 3860

#Unit 3. Fundamental Processes

Guide RNAs:
TLS Online TPP Program

#Question id: 3861

#Unit 3. Fundamental Processes

_ are sequences that are removed from primary transcripts, and _ are sequences that remain present in mature mRNA molecules.
TLS Online TPP Program

#Question id: 3863

#Unit 3. Fundamental Processes

Introns in nuclear pre-mRNAs are excised by:
TLS Online TPP Program

#Question id: 3864

#Unit 3. Fundamental Processes

RNA polymerase: