Exam 2 Key 2011 - Purdue ID: Name: KEY Biol 241 - Spring...

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Purdue ID: Name: KEY Biol 241 - Spring 2011 Midterm II 3/24/2011 Question 1 (36 points) Question 2 (9 points) Question 3 (6 points) Question 4 (10 points) Question 5 (10 points) Question 6 (10 points) Question 7 (11 points) Question 8 (8 points) Total
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Biol 241, Spring 2010 Midterm Exam II Purdue ID: _____KEY__________ 1 Question 1. Multiple-choice (36 points; 2 points each) For 1 and 2, consider the following reassociation kinectics curves from genomics DNA of species A, B, and C. 1) What conclusion can be drawn between species B and C? A) The genome of C contains more highly repetitive DNA. B) The genome of C is more AT rich. C) The genome of C is larger than the genome of B. D) The genome of C is linear and the genome of B is circular. 2) Which one most likely contains highly repetitive DNA elements? A) A. B) B. C) C. D) Cannot be determined from the above data. 3) The Luria-Delbrück fluctuation test demonstrates that: A) Spontaneous mutations are random. B) Certain chemicals are mutagenic. C) RNA can also function as the genetic material. D) DNA is the genetic material. 4) Which of the following best characterizes the regulation of GAL10 gene expression by GAL4? A) Inducible; Negative control. B) Inducible; Positive control. C) Repressible; Negative control. D) Repressible; Positive control.
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Biol 241, Spring 2010 Midterm Exam II Purdue ID: _____KEY__________ 2 5) Which of the following is an example of alkylating agent? A) Acridine orange. B) Ethylmethane sulfonate. C) 5-bromouracil. D) UV light. 6) In E. coli mismatch repair, the correct and incorrect strands are distinguished by: A) The state of adenine methylation in the sequence GATC. B) The presence of unusual bases such as uracils. C) The presence of bulky bases such as thymine dimers. D) The state of cytosine methylation in the sequence of GATC. 7) Which of the following enzymes is used in a direct repair? A) dam methylase. B) Uracil glycosylase. C) DNA polymerase I. D) Photolyase. 8) Deamination of cytosines in DNA will most likely be repaired by: A) Nucleotide excision repair. B) Mismatch repair. C) Base excision repair. D) SOS repair. 9) The direct repeats found at both ends of transposons are A) Generated by staggered cuts of the target sequences during transposition. B) Caused by slippage during DNA replication.
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This note was uploaded on 03/12/2012 for the course BIO 241 taught by Professor Henrychang during the Spring '11 term at Purdue University-West Lafayette.

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Exam 2 Key 2011 - Purdue ID: Name: KEY Biol 241 - Spring...

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