The production of carbon dioxide during respiration in aerobic tissues lowers the pH in erythrocytes, which in turn ________ the affinity of oxygen binding to hemoglobin.

Determine the approximate net charge of the tetrapeptide formed from amino acids 1–4 in that order. At pH 7, what is the approximate net charge? Make sure to include the sign of the charge if appropriate. Identify the ionizable groups that are charged and explain your calculation on the worksheet.

The structures of four amino acids are shown below and labeled 1–4. Using amino acids 1, 2, 3, and 4 in exactly that order, draw the structure of the tetrapeptide formed when they are joined by peptide bonds. Clearly show the N-terminus, C-terminus, all peptide bonds, and the R groups of all four amino acids. Show your work on Part II of the exam.

Weight is normally done on admission and weight is documented in _______________.

The chemical form in which most of the CO₂ is transported in the blood is ________.

Binding of O₂ to hemoglobin acts as a ________ effector.

Which statement about β-sheets is correct?

Which of the following is NOT a feature of allosteric regulation of enzyme activity?

Which enzyme below is fastest?

The structures of four amino acids are shown below and labeled 1–4. For amino acid 2, enter its full name, three-letter abbreviation, and one-letter abbreviation.