Transcript HardPPQs
Some PPQs The Hard Ones! Board for GLUTs 51 21. GLUT-4 29 55 E B 0 2 Time (h) 0 4 33 53 Number Number Number A 2 Time (h) 4 0 2 Time (h) 4 GLUT-4 moves from Golgi to cell membrane after meal D Number Number C Glucose transporter number in response to a glucose load (that is completely cleared from the bloodstream in about 2 hours) 0 2 Time (h) 4 0 2 Time (h) 4 The number of GLUT-4 transporters in the vesicles of the Golgi apparatus in muscle cells 47 22. GLUT-2 46 47 E B 0 2 Time (h) 0 4 2 Time (h) 4 GLUT-2 present all the time D Number 0 2 Time (h) 4 22 0 2 Time (h) 4 Glucose transporter number in response to a glucose load (that is completely cleared from the bloodstream in about 2 hours) Number C 53 Number Number Number A The number of GLUT-2 transporters on the cell membrane of liver cells 0 2 Time (h) 4 46 23. GLUT-1 46 55 E B 0 2 Time (h) 0 4 2 Time (h) 4 GLUT-1 present all the time D Number 0 2 Time (h) 4 17 0 2 Time (h) 4 Glucose transporter number in response to a glucose load (that is completely cleared from the bloodstream in about 2 hours) Number C 56 Number Number Number A The number of GLUT-1 transporters on the cell membrane of brain cells 0 2 Time (h) 4 Board for Glycogenesis 29. Glycogen Synthesis • 86 50 23 27 21 Which statement about the synthesis of glycogen from glucose is INCORRECT? A. The formation of UDP-glucose is facilitated by the joining of two phosphates to form pyrophosphate B. In UDP-glucose, the glucose residue is joined to UDP at the Cpyrophosphate is involve but it is hydrolysed 1 endsneaky! of glucose. C. Glycogen synthesis occurs in the cytoplasm C1 is the end form glycosidic D. Activated glucosethe residues on“activated” UDP-glucose bonds with the C-4 ends of the growing glycogen chain most certainly E. UTP is regenerated by the reaction of UDP and ATP same as B yes. forgot to mention that this year! Board for Fat Digestion 36. Fat Digestion • 34 65 52 39 30 Which treatment would LEAST likely affect the uptake of fatty acids into the epithelial cells of the small intestine after a SINGLE fat meal? A. Co-consumption of a drug which prevents emptying of the gall bladder B. Co-consumption ofwould a drug to prevent thedigestion formation of bile salts prevent efficient of fat in the liver C. Substituting 50% of the fat in the meal with Olestra bile alreadylipase in the gall bladder D. Co-consumption of a salts pancreatic inhibitor with the meal E. Co-consumption of a compound that prevents the formation of micelles only half the fat would be available would not be able to digest the fat would not be able to emulsify the fat – lipase wont work Coupling Analysis • Big Holes in Knowledge: – Role of final electron acceptor – The site of oxygen consumption – Function of ETC is distinct from ATP synthase, although one uses the product of the other • Need to understand this distinction to answer all “uncoupler” questions • ATP is made by F1F0ATPase (aka ATP synthase) and oxygen is used by the ETC not ATP synthase • Ambiguities: – Be careful when you use “continues”. Continues relative to what? – Be careful when you use “stops”. Does it cease completely? – Negating the stem within the answer(s). It is confusing, especially in a stressful situation. Board for Coupling worst questions in Exam last year Attempts Practical Part 230 210 200 190 180 170 This wasn’t discussed in the lecture, but shows that lots of people left the last batch of questions blank 160 Q92 Q87 Q82 Q77 Q73 Q68 Q63 Q58 Q53 Q49 Q44 Q39 Q34 Q29 Q25 Q20 Q15 Q10 Q5 150 Q1 Students Answering Question 220 Also not discussed in the lecture But it might cheer you up. My dog, Pippa, peering over the banisters, making sure that you start studying.