Feedback for Multiple Choice Quiz 33

  1. The four incorrect answers are variations on the important features of DNA listed in the correct answer.

  2. All biological polynucleotides have 3'-->5' phosphodiester linkages.

  3. Higher counterion concentrations stabilize double stranded DNA (and RNA) by partially neutralizing the large number of negatively charged phosphates in the backbone.

  4. "Glycosidic bond" is the general term referring to any bond made to the C1' position of the sugar.

  5. Both separation techniques are based on the molecular seiving principle that also separates proteins on gel filtration columns.

  6. The absorption properties of DNA are due to absorption of UV light by the nucleotide bases.

  7. All four are important features of this pyrimidine.

  8. The different names for the chemically-equivalent grooves in DNA and RNA are useful because they describe the relative dimensions (major & minor) or shape (deep & shallow).
  All of the correct answers have a green check mark.
  Incorrect answers have the "red-lit" button next to your choice.