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TLS Online TPP Program

#Question id: 5227

One of the characteristics of retrotransposons is that

#Unit 11. Evolution and Behavior

  1. they code for an enzyme that synthesizes DNA using an RNA template.

  2. they are found only in animal cells.

  3. they generally move by a cut-and-paste mechanism.

  4. they contribute a significant portion of the genetic variability seen within a population of gametes.

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TLS Online TPP Program

#Question id: 2712

#Unit 2. Cellular Organization

A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. One of her colleagues suggested she try increased methylation of cytosine (C) nucleotides in the DNA of promoters of a mammalian system. Which of the following results would she most likely see?
TLS Online TPP Program

#Question id: 12352

#Unit 10. Ecological Principles

Which of the following populations is most likely to go extinct?
TLS Online TPP Program

#Question id: 351

#Unit 1. Molecules and their Interaction Relevant to Biology

 If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the concentration of H+ ions ________.
TLS Online TPP Program

#Question id: 5438

#Unit 8. Inheritance Biology

Which of the following statement is incorrect?
TLS Online TPP Program

#Question id: 26879

#Unit 10. Ecological Principles

All characteristics of k-selected species, except