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TLS Online TPP Program

#Question id: 9154

The main reason polar regions are cooler than the equator is that ________.

#Unit 9. Diversity of Life Forms
  1. solar radiation strikes the poles at a lower angle and travels through more atmosphere
  2. the poles are farther from the sun than is the equator
  3. the polar atmosphere is thinner and contains fewer greenhouse gases
  4. the poles are permanently tilted away from the sun
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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: 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:
TLS Online TPP Program

#Question id: 3875

#Unit 3. Fundamental Processes

Splicing of introns in nuclear mRNA primary transcripts requires: