Question
trying to answer practice test but stuck on following questions
NAME BIO 361 FINAL VERSION B 7. Which following statements is INcoRRECT about the regulatiow of enzyme activity in and Krebs gale? b) Citrate synthase is inhibited by pyruvate. c) Isocitrate dehydrogenase is inhibited by ATP. te dehydrogenase is inhibited by succinyl CoA. inhibited by citrate. 8. following strategies will Ancrease mrvinti times under anowia. ExCEPTpr amounts of glycogrn for times ofenvironmental anaerobiosis. depressing metabolic rates. ej eliminating lactate by converting it to ethanol. increase the coesumption of glucose. ncrease the activity of the Krebs cycle and thus the production af NADH. 9. Which ofthe foliowing is the moot energetically expensive way to cover distaeee? a Running by swimming Both running and swimming e) Both flying and swimming. 10. In endothermic vertebrates Va is about. than resting consumpton. a 15-10 times lower. 2-5 times lower. c) 2times lower. d) 2-5 times high e) 5.10 times high an the comparison of rates of aerobic catabolism during rest and 11 Which statement and a. Basal or standard metabolic rates (BMR or SMR) are 5-10 times higher in ectotherms in b.) V is 5-10 times higher in ectotherms in comparison to endotherms is similar to the BMRinendotherms. in ectotherms d. The basal metabolic rate and V are always more than 10 times bigher in endotherms of the same lice rate and are 2 times higher in endotherms than in e) The basal metabol body weight due to the Qur effect of the same 12. When organisms are under environmental stress they are a) Reduce their investment into maintenance. b) Reduce the rate of Increase the activity of the glutathione system. d) produce fewer reducing equivalents in form of NADPH. e.) Increase the production of ATP by increasing the activity of the ETC
Explanation / Answer
7. Which of the following is incorrect about the regulation of enzyme activity in glycolysis and Krebs cycle.
b). Citrate synthase is inhibited by pyruvate.
The major part and first reaction of Krebs cycle which involves combining of acetyl co-A with a molecule of oxalo acetic acid to form a molecule of citric acid. And this reaction is catalyzed by enzyme citrate synthase which is inhibited by ATP.
