BCH311-Fall2009-SII-SampleExamkey - BCH311 Section II...

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BCH311 Section II Sample Exam - Niall Howlett, Ph.D. 1. The double helix of DNA is which level of structure? a) primary b) * secondary c) tertiary d) quaternary e) The answer is indeterminate 2. Nucleotides are distinguished from nucleosides by the fact that nucleotides lack the phosphate group. a) True b) * False 3. The linkage between the sugar and base in nucleic acids is best described as: a) Glycoside b) * N-glycoside c) O-glycoside d) Thio-glycoside e) Phosphodiester bond 4. Hydrophobic bonding via pi-orbital electrons is referred to as a) * base stacking b) propeller twist c) hyperchromicity d) supercoiling 5. Histones contain large amounts of which of the following amino acids? a) histidine b) glutamic acid c) * lysine d) leucine e) tryptophan 6. The A and B forms of DNA a) both have 10 base pairs per turn of the helix b) both have 11 base pairs per turn of the helix c) are both left-handed helices d) * are both right-handed helices 7. Answer the following questions about this structure. a) Does it form DNA or RNA? RNA b) What type of nucleic acid base is present? Purine c) Name the sugar present. Beta-D-ribose d) Name this structure Adenosine 5’monophosphate
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8. The flow of genetic information is RNA DNA in a) all organisms b) all prokaryotes c) * retroviruses d) no known organisms 9. 5’-CCAATTAGGGTTAGGGTTAGGG-3’ a) Draw the complementary DNA strand 3’-GGTTAATCCCAATCCCAATCCC-5’ b) Transcribe this DNA sequence into RNA 5’-CCAAUUAGGGUUAGGGUUAGGG-3’ c) Where in eukaryotic chromosomes might this sequence be observed? Telomere 10. Since DNA synthesis is bidirectional from the origin, the number of new strands being made simultaneously in E. coli is: a) one b) two c) three d) * four e) the answer cannot be determined from this information 11. Which of the following best describes the process of DNA replication in a prokaryote? a)
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This note was uploaded on 12/05/2009 for the course BCH 311 taught by Professor Howlett during the Fall '08 term at Rhode Island.

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BCH311-Fall2009-SII-SampleExamkey - BCH311 Section II...

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