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TLS Online TPP Program

#Question id: 3881

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

#SCPH28 | Zoology

  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: 4312

#SCPH06 I Botany

Among the newly discovered small noncoding RNAs, one type helps to reestablish ethylation patterns during gamete formation and blocks expression of some transposons. Which of the following types of RNA is responsible for this function?
TLS Online TPP Program

#Question id: 1395

#SCPH28 | Zoology

Which of the following mutations would promote malignancy in cells whose proliferation is inhibited by TGFβ?

a. overexpression of Smad2               

b. loss of Smad 4

c. overexpression of TGFβ receptor I

d. loss of TGFβ receptor II
TLS Online TPP Program

#Question id: 11007

#I Life Science/ Life Sciences Group – I-V

A 25-year-old, well-conditioned athlete weighs 80 kg (176 lb). During maximal sympathetic stimulation, what is the plateau level of his cardiac output function curve?
TLS Online TPP Program

#Question id: 10954

#SCPH28 | Zoology

A patient suffers from a congenital deficiency in factor XIII (fibrin-stabilizing factor). What would analysis of his blood reveal?
TLS Online TPP Program

#Question id: 2710

#SCPH05 I Biotechnology

Which of the following most accurately describes a retrotransposon?