practiceexam - PRACTICE EXAM 1 Albumin a a blood protein...

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PRACTICE EXAM 1. Albumin a) a blood protein that carries fatty acids and sometimes drugs b) carries oxygen in the blood stream c) delivers sterols such as cholesterol through the cell membrane d) a cell bound receptor e) is an enzyme 2. A contraction protein a) mucin b) actin c) tubulin d) enkephalin e) elastase 2. An amino acid with a pI of 3 could have the following set of pKas. 4. The effective range of a buffer is: a) whenever the buffer is predominantly a zwitterion b) when the buffer is mostly in its basic form c) high concentrations of either weak acid or base d) within 1 pH unit of its pI e) within 1 pH unit of its pK a 5. Which of the following amino acids is aliphatic nonpolar? 6. A small naturally occurring peptide. 1
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7. Which of the following amino acids pairs are aromatic? a) valine and histidine b) tryptophan and isoleucine c) tyrosine and proline d) histidine and proline e) tyrosine and tryptophan 8. In an electric field, using a buffer of pH = 6.0, an amino acid with a pI of 9 will 9. The accompanying dipeptide is: O O 10. Which is NOT true of an α -helix? 2
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