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TLS Online TPP Program

#Question id: 3881

Which one of the following statements about mRNA stability is true?

#Unit 3. Fundamental Processes

  1. Degradation always proceeds in the 5' to 3' direction.

  2. Degradation of mRNA by polynucleotide phosphorylase yields 5'-nucleoside monophosphates.

  3. In general, bacterial mRNAs have longer half-lives than do eukaryotic mRNAs.

  4. Secondary structure in mRNA (hairpins, for example) slows the rate of degradation.

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TLS Online TPP Program

#Question id: 5704

#Unit 8. Inheritance Biology

What kind of pairing configuration would be seen in prophase of meiosis I in (a) an inversion homozygous, (b) a translocation heterozygote?
TLS Online TPP Program

#Question id: 434

#Unit 1. Molecules and their Interaction Relevant to Biology

 Anabolic and catabolic reactions in eukaryotes can occur simultaneously in cells. This is possible because ________.
TLS Online TPP Program

#Question id: 3432

#Unit 11. Evolution and Behavior

Which of the following statements is (are) true of fixed action patterns?
TLS Online TPP Program

#Question id: 1390

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements describes the events of apoptosis?
TLS Online TPP Program

#Question id: 4381

#Unit 3. Fundamental Processes

All the following statements about heterochromatin are true except: