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Cell Energy Practice Questions (Honors) Name: ________ 1. The process by which they obtain energy classifies plants as Date: _________ 6. During photosynthesis, energized photosystems embedded in the thylakoid membranes of chloroplasts produce which of the following? A) photoheterotrophs B) chemoheterotrophs A) ADP and H 2O B) H 2O and ATP C) chemoautotrophs C) ATP and NAD + D) Sugar and O 2 D) poikilotherms E) ATP and NADPH E) photoautotrophs 2. Organisms generally referred to as plants are NOT A) autotrophic B) parasitic C) holotrophic D) heterotrophic 7. In C 4 plants, the carbon needed in the dark reaction is provided from within the plant by the oxidation of A) acetic acid B) malate C) PEP D) carbon dioxide E) oxaloacetic acid E) holophytic 3. The proton gradient created across the thylakoid membrane depends greatly on which of the following as its source of power? 8. The dark reaction is part of A) cyclic phosphorylation B) noncyclic photophosphorylation A) Oxygen B) NADPH C) oxidative phosphorylation C) Light D) ATP D) both a and b E) CO 2 E) none of the above 4. C4 plants have a unique leaf anatomy because they consist of two photosynthetic cells called 9. Cyclic photophosphorylation activates A) neither PS I nor PS II A) stem cells and bundle-sheath cells B) PS I then PS II B) mesophyll cells and guard cells C) PS II only C) phloem and xylem D) PS II then PS I D) vascular cells and plasmodesmata E) PS I only E) bundle-sheath cells and mesophyll cells 5. Light absorbed by chlorophyll drives a transfer of electrons and hydrogen from water to an acceptor called A) NADP + C) CO 2 B) 10. Noncyclic photophosphorylation in photosynthesis activates NAD+ A) PS II only B) PS I then PS II C) PS I and PS II simultaneously D) O2 D) PS II then PS I E) ADP E) PS I only Page 1 Ms. Kavner Cell Energy 11. Chemiosmosis in photosynthesis occurs 14. Base your answer to the following question on the following diagram. A) within the stroma only B) across the chloroplast membrane C) across the plasma membrane D) across the thylakoid membrane E) within the grana only 12. Photolysis in photosynthesis A) synthesizes water B) synthesizes oxygen gas C) splits light with magnesium The action spectrum of plant A should peak at D) splits water A) blue B) yellow E) splits oxygen gas C) green D) violet 13. Base your answer to the following question on the diagram below. E) red 15. The net amount of ATP produced in photosynthesis is A) 0 ATP B) 36 ATP C) 38 ATP D) 2 ATP E) 34 ATP 16. Cyclic photophosphorylation takes place during A) carbon fixation B) the light reactions C) photolysis Photosynthesis in both C 3 and C 4 plants occurs in A) B only B) B and C only C) C only D) A only E) A, B and C D) anaerobic respiration E) aerobic respiration 17. How are cellular respiration and photosynthesis related in plants? A) Both respiration and photosynthesis use the same starting materials. B) They occur in the same organelles. C) They are not related. D) The products of photosynthesis are the starting materials for respiration, and vice versa. E) Both respiration and photosynthesis have the same product. Page 2 Ms. Kavner Cell Energy 18. What distinguishes C3 plants from C4 plants? A) Only C4 plants are capable of photosynthesis. 22. Which is the main photosynthetic tissue of plants? A) Cuticle B) Stem B) There are no differences between the two. C) Xylem D) mesophyll C) They are members of different phylum. E) Pericycle D) C3 plants are found only in dry, hot environments, while C4 plants are found in all environments. 23. Which is true of photosynthesis? A) O2 is taken in by the cells B) CO 2 and H 2 O are taken in by the cells E) C4 plants have two types of photosynthetic tissue, while C3 plants have only one type. C) Glucose is broken down D) This life process takes place in the cells of each organism 19. CAM plants use a photosynthetic adaptation to account for what type of conditions? A) Wet, cold environment B) Wet, hot environment C) Dry, hot environment E) This process may occur in a dark environment 24. Chlorophyll absorbs which of the following wavelengths of light least efficiently? D) Cold, windy environment E) Dry, cold environment 20. Which of the following are reactants in photosynthesis? A) Nitrogen B) Glucose B) Krebs Cycle C) Calvin Cycle D) Light dependent reactions of photosynthesis 21. The process of fixing carbon dioxide into carbohydrates occurs in the D) carbon photophosphorylation D) Orange A) Glycolysis E) Carbon dioxide and water C) light independent process C) Green 25. The process in which a reaction with carbon dioxide leads to the formation of a carbohydrate is D) Oxygen B) glycolysis B) Violet E) Blue C) Carbon dioxide and glucose A) light dependent process A) Red E) Oxidative phosphorylation 26. Which of the following describes the portion of inner mitochondrial membrane permeable to only H + ? A) FADH 2 gradient E) synthesis of ATP B) ATP synthase channel C) Ubiquinone of the electron transport chain D) Cytochrome of the electron transport chain E) NADH channel Page 3 Ms. Kavner Cell Energy 27. An organism cannot survive without catabolic pathways because A) the excess free energy causes instability 30. Base your answer to the following question on your knowledge of aerobic respiration of one molecule of glucose. B) glucose would be rapidly broken down into carbon dioxide and water How much ATP is produced by substrate-level phosphorylation? C) proteins would never be formed from amino acids A) 4 ATP B) 6 ATP C) 8 ATP D) 0 ATP D) spontaneous chemical reactions would not occur E) 2 ATP E) energy would never be released from complex molecules 31. The process of aerobic respiration A) only occurs right after food consumption B) occurs many times simultaneously 28. The H+ gradient established on the opposite sides of the mitochondrial matrix is C) only occurs during the day D) involves gas exchange between cells A) directly responsible for lowing the pH within the mitochondria E) completes one cycle before metabolizing another glucose molecule B) responsible for the reduction of NAD 32. Which of the following does NOT occur in glycolysis? C) the direct energy source driving the synthesis of ATP during oxidative phosphorylation A) Phosphorylation D) responsible for establishing the Na-K balance across the membrane B) Oxidation E) necessary for the initiation of the Kreb's cycle D) Enzyme-catalyzed catabolism 29. The presence of oxygen within a eukaryotic cell, the two pyruvate molecules produced by glycolysis C) ATP consumption E) Catabolism of pyruvate 33. In anaerobic respiration, ATP is formed through A) hydrolysis A) travel to the mitochondrion to take part in the Kreb's cycle B) enzyme-deficient anabolism C) substrate-level phosphorylation B) enter the electron transport chain D) chemiosmosis C) provide a source of energy for the creation of ATP through chemiosmosis E) oxidative phosphorylation 34. Glycolysis occurs in the D) phosphorylate to form ATP for cell processes E) remain in the cytosol to drive the synthesis of ATP in oxidative phosphorylation Page 4 A) cytoplasm B) grana C) mitochondria D) both a and b E) a, b and c Ms. Kavner Cell Energy 35. What is true of aerobic respiration but NOT of anaerobic respiration? A) Reduction-oxidation reactions occur. B) Glycolysis is the primary process. C) 2 ATP are required for activation. D) Proteins are metabolized. E) A chemiosmotic gradient is established. 36. Base your answer to the following question on the diagram below. The molecule indicated by X is A) ATP B) O 2 C) CO 2 37. Which of the following molecules is NOT an electron donor? D) H 2O E) PGAL 38. The chemiosmotic gradient in aerobic respiration drives the process(es) of A) ATP B) FADH 2 A) TCA cycle C) H 2O D) NADH 2 B) carbon fixation E) O 2 C) electron transport chain D) ATP synthesis E) photophosphorylation Page 5 Ms. Kavner Cell Energy 39. In aerobic respiration, the final electron acceptor is 44. Which of the following is a common feature of both aerobic and anaerobic respiration? A) carbon dioxide B) NADH 2 A) Fermentation C) ATP D) water B) Cytochromes E) oxygen C) Krebs cycle D) Glycolysis 40. The molecule that enters the mitochondria in order to begin the Krebs Cycle is E) Electron transport chain 45. The cytoplasm is the site of which process? A) acetyl CoA B) phosphofructokinase A) Oxidative phosphorylation C) acetic acid B) The aerobic phase of metabolism D) pyruvate C) The Kreb's cycle E) glucose D) The citric acid cycle E) Glycolysis 41. The Kreb's cycle occurs in the 46. The citric acid cycle occurs in which organelle? A) Golgi apparatus B) ribosome A) Cytoplasm C) mitochondrial matrix B) Ribosome D) mitochondrial cristae C) Endoplasmic reticulum E) cytosol D) Mitochondria 42. Where is the most ATP made during aerobic cellular respiration? A) Electron transport chain E) Golgi complex 47. During respiration, the net energy gain during the glycolysis phase is B) Golgi apparatus A) 2 ATP B) 16 ATP C) Ribosomes C) 8 ATP D) 4 ATP D) Cytoplasm E) 34 ATP E) Thylakoids 43. The production of ATP during electron transport is called 48. During cellular respiration, most ATP molecules are generated via A) the Kreb's cycle and glycolysis A) oxidative phosphorylation B) fermentation and the electron transport chain B) dephosphorylation C) fermentation C) substrate phosphorylation and fermentation D) substrate phosphorylation D) the Kreb's cycle and the electron transport chain E) double phosphorylation E) glycolysis and the electron transport chain Page 6 Ms. Kavner Cell Energy 49. A proton gradient is generated across the inner 53. The effect of yeast in bread dough rising is mitochondrial membrane during (the) caused by A) glycolysis B) electron transport chain A) ethanol and CO2 production in yeast aerobic respiration C) substate phosphorylation B) yeast apoptosis D) Kreb's cycle C) lactic acid production in yeast anaerobic respiration E) anaerobic fermentation D) CO 2 production in yeast anaerobic respiration 50. Which process produces ATP and lactic acid? A) Electron Transport Chain E) ethanol production in yeast anaerobic respiration B) Chemiosmosis C) Glycolysis 54. Which of the following cellular energy pathways probably occurred first evolutionarily? D) The Krebs Cycle E) Fermentation 51. In the absence of atmospheric oxygen, lactic acid may be found in all of the following EXCEPT A) Kreb's cycle B) Glycolysis C) Calvin cycle A) E. coli D) Electron transport chain B) yeast E) Photolysis C) cells in the human bicep 55. One product of anaerobic plant metabolism is D) cells in the human heart E) none of the above 52. Which of the following processes utilizes ATP? A) ethyl alcohol B) nitrogen C) pyruvic acid D) lactic acid E) phosphorus A) Fermentation B) Photosynthesis C) Dehydration synthesis D) Glycolysis E) All of the above Page 7 Ms. Kavner Answer Key Cell Energy SAT2 Practice 1. E 32. E 2. D 33. C 3. C 34. A 4. E 35. E 5. A 36. B 6. E 37. E 7. B 38. D 8. E 39. E 9. E 40. A 10. D 41. C 11. D 42. A 12. D 43. A 13. D 44. D 14. A 45. E 15. A 46. D 16. B 47. A 17. D 48. D 18. E 49. B 19. C 50. E 20. E 51. D 21. C 52. E 22. D 53. D 23. B 54. B 24. C 55. A 25. C 26. B 27. E 28. C 29. A 30. A 31. B Page 8 Ms. Kavner