Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 56821
TLS Online TPP Program

#Question id: 12315

In the evolution of whelk- eating behavior in crows, which of the following did natural selection minimize? 

#Unit 10. Ecological Principles
  1. The average number of drops required to break the shell
  2. The average height a bird flew to drop a shell
  3. The average total energy used to break shells
  4. The average size of the shells dropped by the birds
More Questions
TLS Online TPP Program

#Question id: 23681

#Unit 13. Methods in Biology

Which enzyme was used to produce the molecule in Figure 20.1?
TLS Online TPP Program

#Question id: 23680

#Unit 13. Methods in Biology

Who won the Nobel Prize in 1993 for his work on site-directed mutagenesis?
TLS Online TPP Program

#Question id: 23678

#Unit 13. Methods in Biology

Which component is not necessary for a PCR experiment?
TLS Online TPP Program

#Question id: 23676

#Unit 13. Methods in Biology

What is the purpose of the heating cycle during PCR?
TLS Online TPP Program

#Question id: 23675

#Unit 13. Methods in Biology

After ten cycles of PCR, by approximately what factor will the number of DNA molecules in a sample be increased? Assume maximum efficiency.
TLS Online TPP Program

#Question id: 23674

#Unit 13. Methods in Biology

Why is Taq polymerase used in PCR rather than DNA polymerases from other sources?