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Unformatted text preview: Chm 365 Name: Exam 1 Sept. 20,2004 Do all 21 questions. All questions are worth 5 points each. Part I: Multiple Choice. Circle the single, best answer for each of the following. 1. Which of the following determines the structure and function of a protein and its relationship to other proteins? a) the primary structure of the protein b) the secondary structure of the protein c) the tertiary structure of the protein d) the quaternary structure of the protein 2. Which organelle contains oxidative enzymes involving H 2 O 2 ? a) mitochondria b) lysosomes c) peroxisomes d) golgi apparatus e) endoplasmic reticulum 3. Which of the following is true about isoelectric points, pI? a) The pI value is calculated from the average of the two pK values that control the boundaries of the neutral molecule formation. b) At pH values above the pI of a molecule, the molecule assumes a net negative charge. c) At pH values below the pI of a molecule, the molecule assumes a net positive charge. d) The isoelectric points of proteins are best determined experimentally. e) All of the above are true statements 4. Which of the following weak acids will be 80% ionized at pH 3.10? a) pyruvic acid pK=2.50 b) acetoacetic acid pK=3.6 c) lactic acid pK=3.86 d) -hydroxybutyric acid pK=4.7 e) propionic acid pK=4.86 5. In the three-dimensional structure of immunoglobulins: a) In each chain (H and L) the C and V regions fold onto one another, forming C-V interactions. In each chain (H and L) the C and V regions fold onto one another, forming C-V interactions....
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This note was uploaded on 11/07/2009 for the course CHEM 365 taught by Professor Dr during the Fall '10 term at Emporia.
- Fall '10