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TLS Online TPP Program

#Question id: 2070

The sodium-potassium pump is called an electrogenic pump because it:

#Unit 2. Cellular Organization

  1. pumps equal quantities of Na+ and K+ across the membrane in opposite directions

  2. is used to drive the transport of glucose against a concentration gradient

  3. decreases the voltage difference across the membrane

  4. generates voltage across the membrane

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TLS Online TPP Program

#Question id: 3868

#Unit 3. Fundamental Processes

The sigma factor of E. coli RNA polymerase: 
TLS Online TPP Program

#Question id: 3869

#Unit 3. Fundamental Processes

Which one of the following statements about E. coli RNA polymerase (core enzyme) is false?
TLS Online TPP Program

#Question id: 3870

#Unit 3. Fundamental Processes

“Footprinting” or DNase protection is a technique used to identify:
TLS Online TPP Program

#Question id: 3871

#Unit 3. Fundamental Processes

Which of the following is not known to be involved in initiation by eukaryotic RNA polymerase II?
TLS Online TPP Program

#Question id: 3873

#Unit 3. Fundamental Processes

The excision (splicing) of many group I introns requires, in addition to the primary transcript RNA:
TLS Online TPP Program

#Question id: 3874

#Unit 3. Fundamental Processes

A branched (“lariat”) structure is formed during: