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SC BIOL 425 - plant test 1-3 (1)

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Test 11. Which of the following statements about the phragmoplast is FALSE?a. It is composed of microtubulesb. Its formation precedes the growth of the cell platec. It forms between the two daughter nucleid. It begins to form at the walls of the dividing cell and grows inwarde. In cells with large vacuoles, it is formed within the phragmosome.2. The most abundant component(s) of the mitochondrial electron transport chain is/are:a. Iron-sulfur proteinsb. FADc. NAD+d. Cytochromese. Coenzyme Q3. Turgor pressure results most directly from:a. Solutes moving into a cell by osmosisb. Water moving out of a cell by osmosisc. Water moving from one portion of the cytoplasm to anotherd. Water moving into a cell by osmosise. Solutes moving out of a cell by osmosis4. In the antenna complex, light energy can be transferred from one pigment molecule to another by:a. Fluorescenceb. Pigment activationc. Resonance energy transferd. Oxidatione. Reduction5. An aquaporin is a:a. Protein that binds water inside the cytosolb. Channel protein for waterc. Hole in a water moleculed. Carrier protein for watere. Carbohydrate that binds water to prevent bursting of the cell6. Small nonpolar molecules, such as O2 and CO2 enter a cell by:a. Osmosisb. Vesicle-mediated transportc. Facilitated diffusiond. Active transporte. Simple Diffusion7. The malate or aspartate produced in the C4 pathway moves next into:a. Photosystem Ib. The bundle-sheath cellsc. The stomatad. The mesophyll cellse. Photosystem II8. Which of the following statements about secondary metabolites is FALSE?a. Their concentration in a plant can vary greatly over a 24-hour periodb. Some are produced only after the plant has been damagedc. They are found in all cells of a plantd. They frequently are synthesized in one part of the plant and stored in anothere. Some function as chemical signals or in the defense of the plant against herbivores9. Oxidative phosphorylation depends on a gradient of _____________ across the mitochondrial membrane.a. Protonsb. Phosphatec. ADPd. Glucosee. Electrons10. Which of the following statements about ATP synthase is FALSE?a. It synthesizes ATPb. It synthesizes electronsc. It transports hydrogen ionsd. It binds phosphatee. It binds ADP11. In photophosphorylation, the role of the ATP synthase complex is to provide a channel for protons to flow back into the:a. Lumen of the thylakoidb. Inter membrane space of the mitochondriac. Inter membrane space of the chloroplastd. Chloroplast stromae. Cytosol12. Which of the following is NOT part of the endomembrane system?a. Golgi complexb. Plasma membranec. Tonoplastd. Nuclear envelopee. Mitochondrial membrane13. Cellulose synthase is an enzyme situated in the:a. Plasma membraneb. Mitochondriac. Chloroplastsd. Vacuolee. Cell wall14. In the absence of other factors affecting water potential, water will move FROM a region of _________ TO a region of _________.a. Low water potential; high water potentialb. Low pressure; high pressurec. Low solute concentration; high solute concentrationd. Low water concentration; high water concentratione. Low potential energy; high potential energy15. Which pigment occurs in all photosynthetic eukaryotes?a. Bacteriochlorophyllb. Chlorophyll cc. Chlorobium chlorophylld. Chlorophyll be. Chlorophyll a16. Rubisco can use _______ or CO2 as a substratea. 3-phosphoglycerateb. O2c. Glyceraldehyde 3-phosphated. Serinee. Oxaloacetate17. The nucleolus is the structure in which ______ are formeda. Nuclear poresb. Chromosomesc. Portions of the nuclear enveloped. Ribosomese. Units of endoplasmic reticulum18. Nucleic acids are different from proteins in that nucleic acids contain:a. Carbonb. Sulfurc. Nitrogend. Hydrogene. Phosphorus19. Which of the following statements concerning fermentation is FALSE?a. It releases less than 686 kcal/mol of glucoseb. It involves O2 as the ultimate electron acceptorc. It involves the breakdown of organic moleculesd. It is an exergonic processe. It occurs under anaerobic conditions20. The alignment of cellulose micro fibrils in the cell wall is controlled by:a. Nuclear actin filamentsb. Cortical actin filamentsc. Cortical microtubulesd. Cell wall actin filamentse. Nuclear microtubules21. The major classes of secondary plant metabolites are:a. Nucleic acids, alkaloids, and phenolicsb. Sugars and proteinsc. Terpenoids, phenolics, and proteinsd. Alkaloids, phenolics, and terpenoidse. Alkaloids and sugars22. Which of the following lists the correct sequence of cell wall layers, beginningwith the outermost layer and progressing inward?a. Primary wall, middle lamella, secondary wallb. Secondary wall, middle lamella, primary wallc. Middle lamella, secondary wall, primary walld. Secondary wall, primary wall, middle lamellae. Middle lamella, primary wall, secondary wall23. An actin spectrum is different from an absorption spectrum in that an actin spectrum:a. Is the relative effectiveness of different wavelengths for a specific processb. Is the light-transmitting pattern of a pigmentc. Provides evidence that a particular pigment is responsible for a particular processd. Provides information about the extent of reflectancee. Is the light-absorbing pattern of a pigment24. In each turn of the citric acid cycle, how many molecules of ATP are produced?a. 2b. 3c. 1d. 4e. 025. Pyruvate is converted to acetyl CoA in the ________ of the ________.a. Cytosol; cellb. Ribosomes; rough ERc. Matrix; mitochondriad. Cristae; mitochondriae. Lumen; smooth ER26. The principal component of the cell walls of fungi is:a. Phospholipidb. Cellulosec. Chitind. Starche. Protein27. Water is transported upward through the plant body in the:a. Corkb. Epidermisc. Xylemd. Apical meristeme. Phloem28. The O2 evolved in photosynthesis comes from:a. Glucoseb. Carbon Dioxidec. Waterd. (CH2O3)e. (C2H2O3)29. The first law of thermodynamics states that the total energy of a system and its surroundings after an energy conversion is _______ the total energy before the conversion.a. Less than or equal tob. Greater than or equal toc. Less thand. Greater thane. Equal to30. In plasmolysis:a. The entire cell becomes turgidb. The vacuole becomes turgidc. The plasma membrane is pushed against the cell walld. The plasma membrane pulls away from the cell walle. The cell wall shifts into the center of the cytoplasm31. Which of the following is unique to seed division in plants?a. Migration of the mitochondria to the ? of the cellb. Migration of the nucleus to the center of the cellc.


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