Question

12) Consider the conversion of pyruvate to lactate. Which statement is TRUE? OO OH 0 + CHU - C-CH0 pyruvate CH = CH-CH0 lactate a) It is the preparatory step to the creation of acetyl CoA and the release of CO2 b) It is the isomerization that allows glycolysis to occur (→ CH.CHOH + CO2). e) It is the only way to consume electrons under anaerobic conditions. d) It is a "fermentation step which makes ethanol as an alternative fuel. e) It occurs when lactose (milk sugar) is metabolized instead of glucose. 13) The Kreb's Cycle is also known as... a) Glycolysis b) The B-Oxidation Spiral c) The Fatty Acid Cycle d) The Citric Acid Cycle e) Electron Transport 14) Consider the reactions of the Kreb's cycle. Which of the following does NOT involve oxidation-reduction a) isocitrate → a-ketoglutarate b) oxaloacetate citrate c) a-ketoglutarate → succinyl COA d) succinate fumarate e) malate → oxaloacetate 15) One step of glycolysis involves the conversion of phosphoenol pyruvate to pyruvate. Which statement best describes this step? a) It is a condensation b) It is an oxidation (ketone to aldehyde) c) It is an energy consuming step (phosphoenol is a high energy bond carrier) d) It is a dehydration e) It is an energy producing step (a phosphate is transferred to form ATP) 16) What is one of the primary functions of electron transport? a) To move "energy" in the form of "reducing power" (electrons) from the oxidation of carbon to ATP. b) To provide electrons for the conversion of acid (H') to hydride (H'). c) To remove excess electrons from the splitting of sugar in glycolysis. d) To transport electrons to the lungs for respiration where electrons move from oxygen to carbon. e) To provide electrons for the conversion of an open chain sugar (Fischer projection) to a closed ring (Haworth projection)

Answer 1

4) It is "fermentation" step which makes ethanol as an alternative fuel. 11) - The kreb's cycle is also known as - The citric acid cycle. H) Oxaloacetate citrate It is an energy produdng step (a phosphate is transferred to forn ATP. Iti To move "energy in the form of reducing power from the oxidation of carbon to ATP.