2008 intersession - Chemistry 2223b Intersession Midterm,...

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Chemistry 2223b Intersession Midterm, June 2008 Page 1 Please ensure that you have entered and bubbled in your student number correctly. 1. A solution in a flask appears yellow when placed in sunlight. What colour of light is most likely to be absorbed by the solution? A) Black B) Yellow C) Green D) Orange E) Violet 2. Rank the compounds below in the order of increasing wavelength of maximum absorption, from the shortest to the longest. CH 3 NO 2 12 3 4 Shortest Longest A) 1 2 3 4 B) 4 3 2 1 C) 1 2 4 3 D) 3 4 2 1 E) 4 1 2 3
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Chemistry 2223b Intersession Midterm, June 2008 Page 2 3. Which statement regarding singlet and triplet states is correct? A) Triplet states contain three excited electrons, while singlet states contain one B) Triplet states can fluoresce, while singlet states can phosphoresce C) Triplet states do not have vibrational levels, while singlet states do D) Triplet states are formed by vibrational cooling from the (S 1 , 0 ) state E) None of the above 4. Which one of the following absorbs the longest wavelength of light? A) O O B) OH SO 3 H HO 3 S H 2 N NH 2 C) O O 3 H 3 S H 2 N 2 D) O O 3 H 3 S H 2 N 2 E) O O CH 3 H 3 C 3 3
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Chemistry 2223b Intersession Midterm, June 2008 Page 3 5. Which one of the following statements is correct? A) Chlorophyll contains a triarylmethane chromophore B) Phenolphthalein contains a benzoquinone chromophore C) Two forms of heme exist, one of which has an aldehyde auxochrome D) Chlorophyll contains a 4-coordinate metal ion E) Heme contains a 4-coordinate metal ion 6. Chlorophyll is most likely to be found in which part of the plant cell? A) Cytoplasm B) Thylakoids C) Ribosomes D) Mitochondria E) None of the above 7. In prokaryotes, the chemical reactions used for energy production occur in which part of the cell? A) Cytoplasm B) Nucleus C) Mitochondria D) Flagellum E) Ribosome
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Chemistry 2223b Intersession Midterm, June 2008 Page 4 8. 2-Aminopimelic acid is an amino acid produced by certain plants. Which one of A – E could be a correct set of pK a values for the indicated functional groups? O OH O HO NH 3 + I III II I II III A) 2 10 5 B) 5 10 2 C) 2 5 10 D) 10 2 5 E) 5 2 10 9. Which one of the following amino acids is most likely to be naturally occurring? A) CH 3 COO H H 3 N B) 3 OOC H 2 SH C) 3 H 3 N COO H D) H 3 COO H E) H 3 N COO 2 H
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Chemistry 2223b Intersession Midterm, June 2008 Page 5 10. The tertiary structure of a protein best refers to « A) The arrangement of the peptide into a -sheet B) The presence of heme molecules bound to protein C) The interaction of protein subunits D) The way the protein folds over on itself E) The arrangement of the peptide into a -helix 11. Which one of A – E is least likely to be involved in the mechanism of, or formed in, the following reaction? O R NHR' products NaOH A) R NHR' HO O B) O R O C) O R NR' D) HNR' E) H 2 NR'
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Chemistry 2223b Intersession Midterm, June 2008 Page 6 12. A mixture containing alanine, arginine, histidine, and valine was dissolved in a buffer at pH 6 and injected into an HPLC equipped with the column discussed in class (negatively charged and hydrophobic). What is the order of elution of the amino acids from the column, from first to last?
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This note was uploaded on 04/30/2011 for the course CHEMISTRY Chemistry taught by Professor Dr.felixlee during the Winter '11 term at UWO.

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2008 intersession - Chemistry 2223b Intersession Midterm,...

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