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: 32139

#Unit 1. Molecules and their Interaction Relevant to Biology

The core of the helix consists of the base pairs that stack together through

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#Question id: 1410

#Unit 4. Cell Communication and Cell Signaling

The number of alterations in DNA per cell per day is

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#Question id: 20981

#Unit 12. Applied Biology

For constructing the glucose sensor, which of the following is used as a gel?

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#Question id: 959

#Unit 1. Molecules and their Interaction Relevant to Biology

Phenylalanine hydroxylase requires molecular ________ and tetrahydrobiopterin.

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#Question id: 2141

#Unit 2. Cellular Organization

Facilitated diffusion through a biological membrane is: