Exam 1 -- Winter 2004 _Practice_ -- Blank

Exam 1 -- Winter 2004 _Practice_ -- Blank - Bio 305...

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Bio 305 Genetics Hour Exam #1 Special Code 999999 INSTRUCTIONS 1. THE ANSWER SHEET WILL NOT BE SCORABLE UNLESS YOU USE A #2 PENCIL TO FILL IT OUT. IF YOU DO NOT HAVE A #2 PENCIL, GET ONE FROM AN INSTRUCTOR 2. BEFORE BEGINNING THE EXAM, FILL OUT THE INFORMATIONAL SECTIONS ON THE ACCOMPANYING ANSWER SHEET COMPLETELY READ AND FOLLOW THE INSTRUCTIONS ON THE FORM EXACTLY GRID IN YOUR NAME, STUDENT I.D. #, SECTION #, AND SPECIAL CODE # ON THE LEFT-HAND PORTION OF THE ANSWER SHEET. BE SURE TO FILL IN THE CIRCLE IN THE "SPECIAL CODE" COLUMN THAT CORRESPONDS TO THE SPECIAL CODE # THAT APPEARS AT THE TOP OF THE EXAM PAGE. BE VERY NEAT AND CAREFUL WHEN FILLING OUT THE ANSWER SHEET. THE SCANNER IS SENSITIVE AND MAY INTERPRET STRAY PENCIL MARKS AS ANSWERS. 3. EACH QUESTION HAS ONLY ONE CORRECT (OR BEST) ANSWER; ONLY ONE CIRCLE PER QUESTION SHOULD BE FILLED. 4. WHEN YOU FINISH, HAND YOUR ANSWER SHEET TO AN INSTRUCTOR PERSONALLY . DO NOT GIVE IT TO ANYONE ELSE TO HAND IN. ONLY ONE ANSWER SHEET PER STUDENT WILL BE ACCEPTED. 5. THE EXAM CONSISTS OF 20 QUESTIONS PLUS THREE BONUS QUESTIONS AND THREE BLANK PAGES. THE BLANKS ARE FOR YOUR USE AS SCRATCH PAPER. SUGGESTION : GO THROUGH THE EXAM, CIRCLING THE ANSWERS ON THE EXAM ITSELF (YOU CAN USE ANY PEN OR PENCIL FOR THAT). WAIT TO FILL IN THE CIRCLES ON THE ANSWER SHEET WITH A #2 PENCIL UNTIL YOU HAVE FINISHED THE EXAM AND REVIEWED YOUR CHOICES, OR UNTIL THE LAST 15 MINUTES OF THE EXAM PERIOD.
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Bio 305 Genetics Hour Exam #1 Special Code 999999 6. UNLESS INDICATED AS A POSSIBILITY IN THE QUESTION, ASSUME THAT THE GENES IN THE QUESTION ARE UNLINKED. (1) For the biosynthesis of lysine in Neurospora , four compounds are known to be intermediates -- arline, baltine, citrulline and datine . However, the order in which these compounds are produced is unknown. Mutations in four Neurospora genes, lys1 , lys2 , lys3 and lys4 , lead to lysine auxotrophy. Feeding experiments with the known intermediates were performed (+ = growth; ! = no growth). Strain Minimal medium plus: lysine arline baltine citrulline datine lys1 + + ! ! ! lys2 + + ! + + lys3 + + ! + ! lys4 + ! ! ! ! What is the likely order of biosynthesis for these compounds? (a) baltine " datine " citrulline " arline " lysine (b) datine " baltine " citrulline " arline " lysine (c) citrulline " datine " baltine " arline " lysine (d) citrulline " arline " datine " baltine " lysine (e) baltine " datine " arline " citrulline " lysine (f) arline " baltine " datine " citrulline " lysine (g) lysine " citrulline " arline " datine " baltine (h) arline " baltine " citrulline " datine " lysine (i) arline " citrulline " datine " baltine " lysine (j) baltine " arline " datine " citrulline " lysine ______________________________________________________________________________ (2) Three Drosophila genes, pr, vg, and le , are linked in this order on an autosome. The distance
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Exam 1 -- Winter 2004 _Practice_ -- Blank - Bio 305...

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