BCH403 Final Exam Questions and Answers 100% Pass

BCH403 Final Exam Questions and Answers 100% Pass T/F Under physiological conditions, a catabolic pathway will run backwards when there is a high concentration of ATP. - False T/F ATP is the energy currency of the cell. - True Which one of the following statements is correct regarding metabolic pathways? - Metabolic pathways always end at a specific molecule. _______ is a bidirectional glucose transporter. - GLUT2 The glycolytic enzyme that is responsible for trapping glucose in a skeletal muscle cell is _______. - Hexokinase The most important regulatory step of glycolysis is ______. - Phosphofructokinase-1 T/F Pyruvate kinase is the only step of glycolysis that is regulated and generates ATP. - True The most important regulatory step of gluconeogenesis is __________. - Fructose-1,6-bisphosphatase The gluconeogenesis enzyme found in the endoplasmic reticulum is ______________. - Glucose-6- phosphatase T/F Adipose tissue is capable of complete gluconeogenesis (i.e. can synthesize glucose). - False T/F The liver is the major site of gluconeogenesis. - True 2 | P a g e Created by Katelyn Whitman © 2025, All Rights Reserved. 100% PASS GUARANTEE Glycogen synthase: - Is the required site of glycogenesis. Glycogenolysis: - Involves the synthesis of new a(1-4) linkages. T/F a-amylase and isomaltase are required for the breakdown of dietary glycogen - True In glycogen metabolism, the branching enzyme: - Synthesizes all a(1-6) linkages. Glucose-6-phosphate is not involved in the regulation of: - Glucokinase T/F Insulin increases pyruvate kinase activity and decreases the activity of phosphoenolpyruvate carboxykinase. - False Fructose-2,6-bisphosphate: - Activates glycolysis via phosphofructokinase-1 while inactivating glycogenolysis via fructose-1,6-bisphosphatase In skeletal muscles, glycogen synthase: - Is always active when not phosphorylated Pyruvate dehydrogenase is NOT regulated by: - Glucagon The major regulated step in the TCA cycle is: - Citrate synthase Lactate dehydrogenase: - Replenishes NAD+ so that the glycolytic enzyme glyceraldehyde-3- phosphate dehydrogenase can continue to run T/F The entire Tricarboxylic Acid Cycle (or Krebs cycle or TCA cycle) is found in the mitochondria. - True How many electrons can Cyt C carry? - 1 When 3 electrons are transferred onto oxygen (O2), the result is: - hydroxyl radical T/F Complex I is both a flavoprotein and cytochrome - False 3 | P a g e Created by Katelyn Whitman © 2025, All Rights Reserved. 100% PASS GUARANTEE In the liver, cytosolic electrons are transported into the respiratory chain via: - Malate/aspartate shuttle The site of ATP synthesis in Complex V (or ATP synthase or F0F1 complex) is: - aB-subunits T/F Phosphate translocase may transport a proton (H+) into the mitochondrial matrix. - True Which one of the following is not a proton pump? - Complex II T/F Lipoprotein lipase is the only lipase in humans that can cleave all three fatty acids off of the glycerol backbone. - True T/F Triacylglycerols are slightly amphipathic. - False Triacylglycerols that are synthesized in the liver are packaged into: - Very low density lipoproteins Dietary cholesterol is transported to and processed in: - Liver T/F Adipose triglyceride lipase is the rate limiting step of lipolysis (fat mobilization). - True The regulated step of beta-oxidation is: - Carnitine acyltransferase