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TLS Online TPP Program

#Question id: 1076

Why are viroids resistant to nucleases?

#Unit 4. Cell Communication and Cell Signaling

  1. Having a circular RNA "genome," they are resistant to the digestion of most exonucleases (that nibble/digest the free ends of RNA or DNA).

  2. Having a circular RNA "genome," with no protein shell, they are resistant to the protein-degrading activities of nucleases.

  3. Nucleases will only digest DNA, not RNA-so viroids are protected.

  4. Viroids have only been identified in plants. Plant nucleases cannot digest RNA.

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TLS Online TPP Program

#Question id: 4557

#Unit 3. Fundamental Processes

In eukaryotic transcription RNA polymerase II is transcribed
TLS Online TPP Program

#Question id: 28606

#Unit 2. Cellular Organization

From T14 and Y15 remove inhibitory phosphate by___
TLS Online TPP Program

#Question id: 92

#Unit 1. Molecules and their Interaction Relevant to Biology

Monosaccharide derivatives in which an amino group replaces one of the hydroxyl groups may have important roles in
TLS Online TPP Program

#Question id: 24610

#Unit 2. Cellular Organization

Choose which of the following statement is correct
TLS Online TPP Program

#Question id: 10970

#Unit 1. Molecules and their Interaction Relevant to Biology

A mother of blood type A+ who has always been perfectly healthy just delivered her second child. The father is of blood group O−. Knowing that the child is of blood group O− (O, Rh−), what would you expect to find in this child?