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Exam 2 Key - for each omission or for adding something that...

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Answer Key for short answers, bio172, Exam 2 Question 31 Correct answer: A GTPase removes a phosphate group from GTP, converting it to GDP. When G proteins are bound to GDP, they are in an “OFF” state. A Ras without GTPase activity (but can still bind GTP) will be locked in the “ON” state and the pathway will always be active. Partial credits: 6-8 points saying the pathway is active (there were varying explanations here) 3 points and below were for wrong answers. No less than 2 points awarded for this answer Question 32 Correct answer: 2 ATP, 2NAD+, 2Pi in. 4 ATP, 2NADH, and 2 pyruvates out. No penalties if 2 ATP for out. Penalties: 1 to 2 points taken off for failing to mention one of the above (points deducted
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Unformatted text preview: for each omission) or for adding something that didn’t belong or for having the wrong numbers. No more than 2 points off for getting the numbers wrong. Question 33 Correct answer: Since there is no 3’OH group, once a CTP* is added, the reaction can’t go any further and stops. Thus; 5’—TAGCTTCGGATC 3’—ATCGAAGCCTAGCTCGAC Small deductions for thinking the reaction would stop before adding the last ‘C’ or for only drawing the 5’ strand. 3 pts. For just drawing a complimentary strand. No less than 2 pts were awarded for this answer 1. B 2. D 3. C 4. A 5. D 6. E 7. A 8. B 9. D 10.C 11.B 12.C 13.C 14.B 15.A 16.D 17.C 18.B 19.A 20.B 21.C 22.D 23.C 24.B 25.D 26.A 27.B 28.D 29.A 30.B...
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