Greene AP Bio Quiz 5-cellular respiration and fermentation – Flashcards

AThe exergonic rxn 1,3-diphosphoglycerate→3-phophoglycerate is coupled to the rxn ADP+P→ATP. Which of the following is the most likely to be true about the rxn? a. The rxn necver reaches equilibrium b. the rxn is spontaneous c. there is a large decrease in free energy d. the rxn is endergonic e. themperature will on affect the rate constant of the rxn

When NADH donates two electrons to ubiquinone during respiration, ubiquinone is a. reduced b. oxidized c. phosphorylated d. aerobic e. hydrolyzed

Animals inhale air containing oxygen and exhale air with less oxygen and more CO₂. After inhalation, the oxygen missing from the air will mostly be found in a. the CO₂ exhaled b. water c. organic molecules d. ethanol e. lactate

Animals inhale air containing oxygen and exhale air with less oxygen and more CO₂. Most of the CO₂ comes from a. hydrocarbons and the air b. the citric acid cycle c. glycolysis d. waste products

The process that converts glucose to pyruvate, generating a small amt of ATP but no CO₂ is called a. pyruvate oxidation b. glycolysis c. the citric acid cylce d. the respiratory chain e. gluconeogenisis

glycolysis... a. takes place in the mitochondria b. produces no ATP c. has no connection with the respiratory chain d. is the same thing as fermentation e reduces two molecules of NAD+ for every glucose molecule present

Pyruvate oxidation geneates a. acetate b. NADH+H+ from NAD+ c. A change in free energy d. CO₂ e. all of the above

During the first step of the citric acid cycle, energy stored in acetyl CoA is used to a. create a proton gradient b. drive the rxn ADP+P→ATP c. reduce NAD+ to NADH d. drive the rxn oxaloacetate→citric acid e. reduce FAD→FADH₂

In the citric acid cycle, oxidative steps are coupled to a. oxidative phosphorylation b. the oxidation of water c. the oxidation of electron carriers d. the hydrolysis of ATP e. the reduction of electron carriers

Which of the following is produced during the citric acid cycle? a. FAD b. Pyruvate c. Reduced electron carriers d. lactic acid e. water

When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane into the intermambranous space, the result is the a. formation of ATP b. reduction of NAD+ c. creation of a proton grdient d restoration of the Na/K balance across the membrane e. reduction of glucose to lactic acid

In the conversion of succinate to fumerate, hydrogen atoms are transferred to FAD. The conversion of succinate and FAD to fumerate and FADH₂ is an example of a. hydrolysis b. an allosteric rxn c. a metabolic pathway d. an aerobic rxn e. a redox rxn

Which of the following events occurs as pat of the electron transport chain? a. release of CO₂ b. Reduction of CO₂ c. Oxidation of FADH and NADH d. Reduction of NAD+ e. Both a and b

The water that is a by-product of cellular respiration is produced as a result of the a. combining of CO₂ with protons b. conversion of pyruvate to acetyl CoA c. degradation of glucose to pyruvate d. reduction of oxygen at the end of the electron transport chain e. none of the above

Pfk: a. is respnsible for the generation of fructose-6-phosphate b. undergoes a conformational change in the presence of high levels of ATP c. possesses an allosteric site that responds to high levels of ADP d. catalyzes the conversion of fructose-1,6-bisphosphate to a 3-carbon compound e. none of the above

According to the chemiosmotic theory, the energy for the synthesis of ATP as electrons flow down the respiratory chain is provided directly by the a. hydrolysis of GTP b. reduction of NAD+ c. diffusion of protons d. reduction of FAD e. hydrolysis of ATPO

The drug 2,4-dinitrophenol (DNP) destroys the proton gradient across the inner mitochondrial membrane. What would be the effect of incubating isolate mitochondria in a solution of DNP? a. Oxygen would no longer be reduced to water b. No ATP would be made during transport of electrons down the respiratory chain c. Mitochondria would show a burst of increased ATP synthesis d. Glycolysis would stop e. Mitochondria would switch from glycolysis to fermentation

During the fermentation of one molecule of glucose, the net production of ATP is ____ molecule(s) a. one b. two c. three d. six e. eight

In alcoholic fermentation, NAD+ is produced during the a. oxidation of pyruvate to acetyl CoA b. Reduction of pyruvate to lactic acid c. reduction of acetaldehyde to ethanol d. hydrolysis of ATP to ADP e. oxidation of glucose

Regardless of the electron or hydrogen acceptor employed, fermentation always produces a. AMP b. DNA c. P d. NAD+ e. none of the aboce