mid2key - 1 BIS 101 003 MIDTERM II READ THE FOLLOWING...

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1 BIS 101 - 003 MIDTERM II February 20, 2009 READ THE FOLLOWING INSTRUCTIONS: Write your name legibly on each page of this exam. All work must be done in ink . Show all your work. Points will be subtracted for each incorrect answer in multiple-choice questions. However, you will not receive a negative total score for such a question. This exam is worth 100 points. You have 50 min. to complete the exam. Good Luck!
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2 Name:______________________________ ID _________________________ P a g e : 3 ________ 4 ________ 5 ________ 6 ________ 7 ________ 8 ________ Total ________
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3 Name:_____________________________ (1) (a) Use the codon table below to complete the following table. Assume that reading is from left to right and that the columns represent transcriptional and translation alignments. (12 points) C G T A C C A C T G C A G C A T G G T G A C G T 5’ DNA double helix 3’ G C A U G G U G A C G U 3’ mRNA C G U A C C A C U G C A 5’ tRNA anticodons Ala Trp Stop Arg C-terminus Amino acids incorporated into polypeptide (b) Label the 5’ and 3’ ends of DNA and RNA and the amino and carboxyl ends of the polypeptide. (6 points)
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4 Name:_____________________________ (1) A true breeding line of white rabbits with black patches was observed over the period of 10 generations. Over that period, the black patches varied from small to almost covering the entire body. The trait is controlled by a single gene A B and all individuals in the population are know to be homozygous A B A B . The cause of this variation is: Chose the most correct answer. (2 points) (i) incomplete penetrance of the A B gene , (ii) incomplete expressivity of the A B , (iii) codominance (iv) mutation of the A
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mid2key - 1 BIS 101 003 MIDTERM II READ THE FOLLOWING...

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