Exam 2 Key 2008

Exam 2 Key 2008 - Name _ Student number _ BCHM 2024 Exam #...

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Name ____________________________________ Student number ____________________________ BCHM 2024 Exam # 2, March 19, 2008 1. A nucleotide consists of: A. A purine or a pyrimidine B. Both a purine and a pyrimidine C. A purine or pyrimidine, a sugar, and one or more phosphates D. A purine or pyrimidine and one or more phosphates E. A purine or pyrimidine and a sugar 2. Which of the following constituents is not found in DNA? A. Adenine D. Thymine B. Cytosine E. Ribose C. Guanine 3. Which of the constituents of question # 2 is not found in RNA? D 4. What is the ratio of acid (HA) to base (A - ) in a buffer with a pH of 5.0? A. 100:1 B. 10:1 C. 1:1 D. 1:10 E. 1:100 5. Many proteins are phosphorylated. In these proteins phosphate is covalently attached to what amino acid side chain functional group? A. Amide D. Hydroxyl B. Amine E. Imidazole C. Carboxyl F. Thiol 6. Which of the following groups of amino acids all contain a side chain hydroxyl group? A. Val, Leu, Ile D. Arg, His, Lys B. Asp, Gln, Glu E. Cys, Met, Gly C. Ser, Thr, Tyr F. Ala, Phe, Trp 7. Which of the groups of amino acids in question # 7 all have a basic side chain? D For questions 8 to 12, use the following choices: A. Zero B. 1 C. 2 D. 3 E. 4 8. How many atoms of phosphorus are contained in a molecule of phosphatidyl ethanolamine? B 9. How many molecules of fatty acid are esterified in a molecule of phosphatidyl choline? C
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This note was uploaded on 05/06/2008 for the course BCHM 2024 taught by Professor Keenan during the Spring '08 term at Virginia Tech.

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Exam 2 Key 2008 - Name _ Student number _ BCHM 2024 Exam #...

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