Practice Questions

TLS Online TPP Program

#Question id: 23683

What is the enzymatic function of restriction enzymes?

#Unit 13. Methods in Biology

to add new nucleotides to the growing strand of DNA
to join nucleotides during replication
to join nucleotides during transcription
to cleave nucleic acids at specific sites

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TLS Online TPP Program

#Question id: 12535

#Unit 10. Ecological Principles

If you were tracking a nutrient molecule through an ecosystem, which of the following statements would you expect to verify?

TLS Online TPP Program

#Question id: 12536

#Unit 10. Ecological Principles

Which of the following properly links the nutrient to its reservoir?

TLS Online TPP Program

#Question id: 12537

#Unit 10. Ecological Principles

In terms of nutrient cycling, why does timber harvesting in a temperate forest cause less ecological devastation than timber harvesting in tropical rain forests?

TLS Online TPP Program

#Question id: 12538

#Unit 10. Ecological Principles

Some global warming models predict that, if permafrost in the tundra regions in the northern hemisphere melts, atmospheric CO2 levels will increase. Which of the following statements best explains this prediction?

TLS Online TPP Program

#Question id: 12539

#Unit 10. Ecological Principles

Human-induced modifications of the nitrogen cycle can result in

TLS Online TPP Program

#Question id: 12540

#Unit 10. Ecological Principles

Which of the following statements is true?