2010 midterm - Chemistry 2223b Midterm Test 2010 Page 1 1 Which of the statements about the compounds shown below is/are correct NO2 X Y Z 1

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Chemistry 2223b Midterm Test, 2010 Page 1 1. Which of the statements about the compounds shown below is/are correct? NO 2 XY Z 1. Compound Z has the largest HOMO-LUMO gap. 2. Compound X has the longest wavelength of maximum absorption. 3. Compound Y absorbs light of a lower energy than compound X . A) 1 and 2 only B) 2 and 3 only C) All statements are correct D) 1 only E) 3 only 2. Shown below is the structure of adriamycin , a frontline anticancer agent used for the treatment of breast cancer. Which one of A – E best describes the type of chromophore present in adriamycin ? A) Benzoquinone B) Diarylazo group C) Triarylmethane D) Aminoglycoside E) Porphyrin O O NH 2 OH H 3 C O OCH 3 O O CH 2
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Chemistry 2223b Midterm Test, 2010 Page 2 3. Adriamycin appears red when illuminated with white light. What is the colour of light that is most likely absorbed by adriamycin ? A) Green B) White C) Red D) Black E) Violet 4. Adriamycin is a fluorescent compound. Scientists have taken advantage of this property to monitor the distribution of adriamycin in cells, blood vessels, and tumors ( Clin. Cancer Res . 2005, 11 , 8782). Fluorescence is best described as… A) The ability of adriamycin to kill cancer cells B) An emissive process originating from an excited singlet state C) The conversion from an excited vibrational state to a ground vibrational state D) A quantum mechanically forbidden process involving a spin flip E) The promotion of an electron from the HOMO to the LUMO 5. If adriamycin were placed in a UV-visible absorption spectrometer to obtain its absorption spectrum, the resulting spectrum would most likely be a plot of… A) Cancer cells killed as a function of wavelength B) Fluorescence as a function of time C) Absorption as a function of wavelength D) Absorption as a function of time E) Chemical shift as a function of wavelength
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Chemistry 2223b Midterm Test, 2010 Page 3 6. A compound in the (T 1 , υ 0 ) state undergoes a transition to the (S 0 , υ 2 ) state by a radiative process. What is this process called? A) Energy transfer B) Vibrational cooling C) Fluorescence D) Internal conversion E) Phosphorescence 7. Photosynthesis occurs in which part of the plant cell? A) Cell wall B) Thylakoid membranes C) Lipopolysacchairde D) Mitochondria E) Peptidoglycan 8. The 2009 Nobel Prize in Chemistry was awarded “for studies of the structure and function of the ribosome.” Which of these statements is/are correct? 1. X-ray crystallography played an important role in the elucidation of the structure of the ribosome. 2. Prokaryotic cells do not contain ribosomes. 3. Ribosomes use a histidine residue to catalyze the formation of amide bonds. A) 2 and 3 only B) All statements are correct C) 2 only D) 1 and 2 only E) 1 only
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Chemistry 2223b Midterm Test, 2010 Page 4 9. Which one of A – E is the predominant structure of lysine at pH 13?
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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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2010 midterm - Chemistry 2223b Midterm Test 2010 Page 1 1 Which of the statements about the compounds shown below is/are correct NO2 X Y Z 1

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