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TLS Online TPP Program

#Question id: 787

Which of the following statement is INCORRECT with respect to the structure of DNA?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Six adenosines in a row in a DNA helix produce a bend of about 18 degrees.

  2. DNA was first isolated and characterized by Friedrich Miescher who called the phosphorus-containing substance “nuclein.”

  3. It is the pentoses that define the identity of a nucleic acid not the nitrogenous bases.

  4. The Z-DNA tracts do not play any role in regulating the expression of some genes or in genetic recombination.

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TLS Online TPP Program

#Question id: 12567

#Unit 10. Ecological Principles

Which of the following is true about the current research about forest fragmentation?
TLS Online TPP Program

#Question id: 12568

#Unit 10. Ecological Principles

Which of the following would a landscape ecologist consider in designing a nature reserve? 
TLS Online TPP Program

#Question id: 12569

#Unit 10. Ecological Principles

Use the information below about quail habitats to answer the following questions. Which of these represents the best quail habitat in terms of fragmentation and edge
TLS Online TPP Program

#Question id: 12570

#Unit 10. Ecological Principles

Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now in a biodiversity crisis?
TLS Online TPP Program

#Question id: 12571

#Unit 10. Ecological Principles

Although extinction is a natural process, current extinctions are of concern to environmentalists because
TLS Online TPP Program

#Question id: 12572

#Unit 10. Ecological Principles

Use what you know about ecosystem stability and the information provided in the graph below to answer the following question.
Which community (a-e) would likely be the most biodiverse?