Bio 255 Chapter 5 Questions and Answers

Bio 255 Chapter 5 Questions and Answers The chemical substance that enters the Krebs cycle for further metabolism is acetyl-CoA The replacement of electrons lost from chlorophyll molecules in photosynthesis in certain microorganisms depends on the presence of Water Molecules The ultimate fate of electrons transported through the electron transport chain is to unite with a molecule of Oxygen _____________ tests are used to determine whether an organism can ferment a carbohydrate to produce acid and gas. Fermentation Polysaccharides that may result from photosynthesis in microorganisms include glycogen and Starch Which of the following statements applies to fermentation? Fermentation occurs in the absence if oxygen. In bacterial cells, glycolysis takes place in the plasma membrane False, it takes place in the cytoplasm To be useful for energy purposes, fatty acids are broken down into two-carbon units through the process of Beta Oxidation Flavoproteins, cytochromes, and ubiquinones are carrier molecules in electron transport chains. True The compound ribulose phosphate is used in the carbon-fixing reactions of photosynthesis, in which the gas utilized is Carbon Dioxide During cellular respiration, most energy is produced during glycolysis. False During cellular respiration, carbon dioxide is a produced during the Kreb's Cycle. True Which of the following processes does NOT generate ATP? The Calvin-Benson Cycle The energy used to drive the reactions of photosynthesis comes from the Sun In eukaryotic cells glycolysis take place in the mitochondria. False, it takes place in the cytoplasm In terms of producing energy, fermentation is more efficient than respiration. False Many bacteria have another pathway in addition to glycolysis for the oxidation of glucose. True Enzymes are composed of lipids. False During glycolysis, the net gain of ATP is 4. False Substrate bind to enzymes and remain bound. False Eukaryotic cells harness 36 ATP molecules from one molecule of glucose. False Certain microorganisms use nitrite and hydrogen sulfide molecules in a form if metabolism that is Anaerobic The process of chemisomosis accounts for the trapping of energy in ATP molecules Occurs in Cyanobacteria and green sulfur bacteria Photosynthesis Two molecules "invested" to drive the process Glycolysis Involves energy-fixing and carbon-fixing reactions Photosynthesis Hydrogen atoms pumped across a membrane Chemiosis Involves citric acid and oxalaocetic acid Krebs Cycle An important by product is oxygen gas Photosynthesis Results in two molecules of pyruvic acid Glycolysis Begins with the entry of acetyl CoA molecules Krebs Cycle Results in the synthesis of glucose molecules Photosynthesis Products of the process can be used for fermentation Glycolysis The source of the carbon dioxide that we exhale is the TCA cycle True