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TLS Online TPP Program

#Question id: 3867

RNA polymerase from E. coli (core enzyme alone) has all of the following properties except that it:

#Unit 3. Fundamental Processes

  1. can extend an RNA chain and initiate a new chain.

  2. is required for the synthesis of mRNA, rRNA, and tRNA in E. coli.

  3. produces an RNA polymer that begins with a 5'-triphosphate.

  4. recognizes specific start signals in DNA.

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TLS Online TPP Program

#Question id: 4569

#Unit 11. Evolution and Behavior

Which of the following must exist in a population before natural selection can act upon that population?
TLS Online TPP Program

#Question id: 4570

#Unit 11. Evolution and Behavior

Which pair would probably have agreed with the process that is depicted by this tree?
TLS Online TPP Program

#Question id: 4571

#Unit 11. Evolution and Behavior

Evolutionary trees such as this are properly understood by scientists to be
TLS Online TPP Program

#Question id: 4572

#Unit 11. Evolution and Behavior

Of the following anatomical structures, which is homologous to the wing of a bird?
TLS Online TPP Program

#Question id: 4573

#Unit 11. Evolution and Behavior

Which of the following pieces of evidence most strongly supports the common origin of all life on Earth?
TLS Online TPP Program

#Question id: 4576

#Unit 11. Evolution and Behavior

Which of the following pairs of structures is least likely to represent homology?