Version A Name: BIOL 3327: Plant Science Exam 1, 17 Feb 2005 WRITE YOUR VERSION LETTER AT THE VERY TOP OF YOUR ANSWER SHEET.

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1 Version A Name: Last 4 digits of SSN: BIOL 3327: Plant Science Exam 1, 17 Feb 2005 WRITE YOUR VERSION LETTER AT THE VERY TOP OF YOUR ANSWER SHEET. Always choose the BEST answer. You may write on this sheet. Grades will not be posted; exams will be returned in class. Ask if you have any questions. 1. Which of the following are characteristics of living things? a. heredity b. cellular organization c. ability to reproduce d. a and b e. all of the above 2. The first living organisms on Earth are believed to have been. Eventually, organisms evolved that produced oxygen which dramatically altered the composition of Earth s atmosphere. a. autotrophic, heterotrophic b. heterotrophic, autotrophic c. eukaryotic, prokaryotic d. photosynthetic, autotrophic 3. The major challenge facing plants as they evolved from living in water to living on land was how to obtain and conserve: a. carbon dioxide b. oxygen c. water d. nutrients 4. The phrase vascular plants indicates plants that: a. reproduce via seeds b. contain xylem and phloem c. rely on osmosis for water transport among their cells d. grow in moist environments 5. must be present in a population for evolution to occur. a. Variation b. Sexual reproduction c. Mutation d. Meiosis 6. The species concept is based on the concept that individuals that are outwardly similar are more closely related than those that have few outward similarities. a. biological b. morphological c. zoological d. nonsensical 1

2 7. A cell that has two copies of each chromosome is said to be: a. haploid b. diploid c. tetraploid d. pentaploid 8. is a characteristic/process unique to plants that can affect the process of evolution in a plant population. a. polyploidy b. hybridization c. asexual reproduction d. reproductive isolation 9. Mycology is the study of: a. algae b. fungi c. bacteria d. plants 10. Organisms in the domain are prokaryotic and found in extreme environments. a. Archaea b. Bacteria c. Eukarya d. Monera Use the following to answer the next 3 questions: a. Protista b. Fungi c. Plantae d. a or b e. a or c 11. ALL members of the kingdom are heterotrophic. 12. Unicellular heterotrophs may be found in. 13. Multicellular photosynthesizers may be found in. 14. Kingdom Fungi and Kingdom Plantae have all of the following in common EXCEPT: a. all their members are eukaryotic b. they both contain organisms that can photosynthesize c. all their members have cell walls d. they contain mostly multicellular organisms 15. Cyanobacteria are similar to plants in that they: a. use chlorophyll a for photosynthesis b. are eukaryotic c. are heterotrophs d. prefer to live in environments with high concentrations of sulfur 16. Many bacteria are saprophytes meaning they obtain the carbon they need directly from: a. photosynthesis b. live plants c. dead plants d. water molecules 17. The following organisms can cause diseases in plants: a. viruses b. bacteria c. smuts d. rusts e. all of the above 18. The cell walls of fungal cells are composed of: a. cellulose b. hemicellulose c. chitin d. fungi do not have cell walls 19. The four phyla of Fungi are distinguished from one another based on: a. sexual reproductive structure b. presence or absence of septa between cells c. unicellular or multicellular form d. a and b e. all of the above 2

3 20. All of the following are reasons why fungi are important to life on Earth EXCEPT: a. Along with bacteria, fungi are responsible for decomposition of dead organic matter. b. Many fungi cause diseases in plants. c. Some fungi are capable of fermentation and thus important for food for humans. d. Fungi represent the base of the food chain in many ecosystems. 21. The toadstool mushrooms with which you are likely most familiar are members of the Phylum: a. Chytridiomycota b. Zygomycota c. Ascomycota d. Basidiomycota 22. Mycorrhizal fungi frequently provide the roots of their host plants with while the plants provide the fungi with. a. water and nutrients, carbohydrates b. carbohydrates, water and nutrients c. toxins, carbohydrates d. carbohydrates, toxins 23. All of the following are characteristics of algae EXCEPT: a. provide agar for a variety of uses by humans b. bloom in tides that may cause massive fishkills c. form the base of the food chain in most aquatic ecosystems d. decompose dead organic matter in soils 24. To distinguish among the phyla of algae we use the following characteristics EXCEPT: a. presence or absence of cell wall b. eukaryotic or prokaryotic c. photosynthetic pigment d. number of flagella 25. Green algae (Phylum Chlorophyta) are considered to be the direct ancestors of plants. Green algae and plants have the following in common EXCEPT: a. use chlorophyll a and b for photosynthesis b. are all multicellular c. store starch in plastids d. may have a cell wall made of cellulose 26. Lichens are a symbiotic relationship between a fungus and a photobiont which can be either a cyanobacteria or a. a. purple sulfur bacteria b. brown alga c. green alga d. dinoflagellate e. archaea 3

4 Match the following five possible answers to the next 3 statements: a. carbohydrates b. lipids c. proteins d. nucleic acids e. a or b 27. One function is energy storage. 28. Serve as important barrier to water loss for plants 29. ATP represents a modified monomer of this group of organic molecules 30. A molecule that is found in all plant cells and is essential for life is known as: a. a primary metabolite b. a secondary metabolite c. chlorophyll d. Rubisco 31. Organelles important for carbohydrate synthesis and storage that are found only in plants are known as: a. mitochondria b. peroxisomes c. plastids d. vacuoles 32. Cell walls (both primary and secondary) form an impenetrable barrier between plant cells. In order for materials to be transported across primary cell walls the following must be present: a. pit-fields b. plasmodesmata c. stomata d. a and b e. a and c d. a. c. b. Use the diagram of a plant cell above to assign the part of the cell to the following three functions: 33. Site of cellular respiration 34. Site of photosynthesis 35. Storage location for water, metabolites, and other substances 4

5 36. The fact that heat energy is lost during cellular respiration is predicted by: a. the First Law of Thermodynamics b. the Second Law of Thermodynamics c. cell theory d. punctuated equilibrium 37. Cellular respiration is an reaction. a. exergonic b. endergonic 38. Glucose is a: a. monosaccharide b. disaccharide c. polysaccharide d. protein 39. is/are required for photosynthesis to occur. a. light b. water c. Rubisco d. a and b e. a, b, and c 40. In both photosynthesis and cellular respiration, protons are pumped across a membrane to generate a proton gradient. Protons are then transported back across the gradient with the aid of ATP synthase, and ATP is synthesized. In photosynthesis this is known as photophosphorylation while in respiration it is known as oxidative phosphorylation. The more general term for this process is: a. chemiosmotic coupling b. fermentation c. aerobic respiration d. glycolysis 41. If oxygen is present and aerobic respiration occurs, 36 ATP are produced from one molecule of glucose. Most of these ATP molecules are synthesized after the Krebs cycle has completed by using the energy from: a. electrons carried by the coenzymes NADH or FADH 2 b. carbon dioxide c. water d. oxygen 42. In the absence of oxygen, plant cells resort to anaerobic respiration. In this process, plant cells break down glucose to form and CO 2 and produce 2 ATP molecules. a. lactate b. ethanol c. sucrose d. oxygen The next 2 questions relate to the following equation 3CO 2 + 6H 2 O light C 3 H 6 O 3 + 3O 2 + 3H 2 O 43. The equation above represents: a. glucose oxidation b. photosynthesis c. fermentation 44. In the equation above, is oxidized while is reduced. a. CO 2, H 2 O b. H 2 O, CO 2 c. O 2, CO 2 d. CO 2, O 2 5

6 45. Pigments such as chlorophyll b and carotenoids help higher plants photosynthesize more efficiently because: a. they capture light energy at wavelengths at which chlorophyll a is inefficient b. they excite their own electrons to the electron transport chain and synthesize ATP c. these molecules are deterrents to herbivores d. they assist in the Calvin Cycle 46. All of the following occur during the light reactions of photosynthesis EXCEPT: a. water is split into oxygen, electrons, and protons b. NADP+ is reduced to NADPH c. enough ATP molecules are synthesized to power all other cellular functions d. electrons pass through Photosystem II and Photosystem I 47. Which of the following is true about photorespiration? a. produces ATP and NADPH b. occurs when CO 2 concentration is high and O 2 is low c. more common in plants that grow in cool, wet conditions d. is catalyzed by Rubisco 48. Which of the following is true about the carbon fixation reactions in photosynthesis? a. only occurs in the dark b. involves the production of oxygen c. requires more ATP than NADPH for one carbohydrate molecule to be produced d. involves the oxidation of CO Plants with the C 4 pathway for carbon fixation: a. do not employ the C 3 pathway b. use more ATP to fix one CO 2 molecule than plants with only the C 3 pathway c. have more problems with photorespiration than plants with only the C 3 pathway d. are found in only one family of flowering plants 50. Plants are crucial for life on Earth because: a. they produce oxygen which makes up the ozone layer and protects Earth from radiation b. they produce oxygen required by almost all organisms to produce necessary ATP c. photosynthesis converts light energy to food energy available for other organisms d. they reduce atmospheric carbon dioxide thus preventing further greenhouse warming e. all of the above 6

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