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

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#Question id: 8934

#XL - R Botany

At which developmental stage should one be able to first distinguish a protostome embryo from a deuterostome embryo?

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#Question id: 5536

#XL - T Zoology

Which of the following is not related with the spot of invagination during gastrulation?

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#Question id: 4591

#XL - S Microbiology

Which of the following factors could cause a surge in population size?

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#Question id: 15248

#XL - S Microbiology

Which of the following groups of microorganism contain both  superoxide dismutase and catalase enzymes for growth?

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#Question id: 19661

#XL - P Chemistry

Which of the following substances has the highest melting point?