Biochem - Module 6 Exam Questions and Answers Latest Update 2025 Already Passed

Biochem - Module 6 Exam Questions and Answers Latest Update 2025 Already Passed How are the glycolytic enzymes regulated? A) Through transcriptional control B) Through reversible phosphorylation C) Through allosteric control D) All of the above E) None of the above - Answers D) All of the above _______________ are enzymes that catalyze the transfer of a phosphoryl group from ATP to an acceptor A) Phosphatases B) Kinases C) ATPases D) Synthases E) Transferases - Answers B) Kinases _________________ is the principle carbohydrate in living systems A) sucrose B) glycogen C) lactose D) fructose E) glucose - Answers E) glucose The product of aerobic glycolysis is _____________. A) lactate B) gyceraldehyde C) pyruvate D) formate E) alpha-ketoglutarate - Answers C) pyruvate The regeneration of ______________ in the reduction of pyruvate to lactate sustains glycolysis under anaerobic conditions. A) NADH B) NAD C) FADH D) FAD E) FMN - Answers B) NAD The first irreversible enzymatic reaction unique to a metabolic pathway is called the ______________ step A) regulated B) high energy C) exothermic D) rate limiting E) committed - Answers E) committed Which of the following functions as a "flexible swinging arm" when it transfers the reaction intermediate from one active site to the next? a) FAD b) NAD+ c) Lipoamide d) Thiamine pyrophosphate e) coenzyme A - Answers c) Lipoamide Pyruvate dehydrogenase is _________________ when ATP-ADP ratios are high A) activated B) inactivated C) phosphorylated D) B and C E) A and C - Answers D) B and C The cellular carrier of activated acyl groups is ________________. A) CoA B) biotin C) thiamine D) folate E) lipoamide - Answers A) CoA The citric acid cycle is also known as the: A) Krebs cycle B) tricarboxylic acid cycle C) Cori cycle D) A and B E) A, B and C - Answers D) A and B _____________________ is the citric acid cycle intermediate found at both the beginning and the end of the citric acid cycle A) citrate B) IsoCitrate C) malate D) succinate E) oxaloacetate - Answers E) oxaloacetate How many molecules of CO2 are generated during one turn of the citric acid cycle? A) 0 B) 1