#Question id: 5583
#Unit 5. Developmental Biology
In mammals, dosage compensation is carried out by:
#Question id: 2494
#Unit 2. Cellular Organization
Separation of spindle poles during spindle formation and anaphase B most likely depends on which of the following?
#Question id: 5018
#Unit 11. Evolution and Behavior
Which event is nearest in time to the end of the period known as snowball Earth?
#Question id: 713
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following polypeptides is most likely to form an α helix?
#Question id: 177
#Unit 1. Molecules and their Interaction Relevant to Biology
The titration curve of alanine shows the ionization of two functional groups with pKa values of 2.34 and 9.69, corresponding to the ionization of the carboxyl and the protonated amino groups, respectively. The titration of di-, tri-, and larger oligopeptides of alanine also shows the ionization of only two functional groups, although the experimental pKa values are different. The trend in pKa values is summarized in the table. Which of the following is a reason for this shift in pK values