1. Which of these types of organisms produce the biosphere's food supply? A. autotrophs and heterotrophs
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1 Sample Questions: Chapter 7 1 Which of these types of organisms produce the biosphere's food supply? A autotrophs and heterotrophs B consumers and heterotrophs C heterotrophs D autotrophs E consumers 2 In a rosebush, chlorophyll is located in a) thylakoids, which are in chloroplasts in the mesophyll cells of a leaf b) chloroplasts, which are in thylakoids in the mesophyll cells of a leaf c) chloroplasts, which are in mesophyll cells in the thylakoids of a leaf d) mesophyll cells, which are in the thylakoids in chloroplasts in a leaf e) thylakoids, which are in mesophyll cells in the chloroplasts in a leaf 3 How does carbon dioxide enter the leaf? A through the stomata B through the vascular system C through the thylakoids D through the mesophyll E through the chloroplasts 4 Chlorophyll molecules are in which part of the chloroplast? A plasma membrane of thylakoid B stroma C stomata D Golgi apparatus E grana 5 You could distinguish a granum from a mitochondrial membrane because the granum, but not the mitochondrial membrane, would A be inside a mitochondrion B have photosynthetic pigments
2 C contain protein but not lipids D grana and mitochondrial membranes are indistinguishable E function in energy transformation 6 The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers The oxygen comes from a radioisotopes b light c glucose d carbon dioxide e water 7 In photosynthesis, what is the fate of the oxygen atoms present in CO 2? They end up A as molecular oxygen and in sugar molecules 8 B in sugar molecules and in water C in sugar molecules D in water E as O 2 9 In photosynthesis, plants use carbon from to make sugar and other organic molecules A the sun B water C soil D carbon dioxide E chlorophyll 10 Cellular respiration and photosynthesis are similar in that both involve A water splitting B redox reactions C the release O 2 into the atmosphere D the release of CO 2 into the atmosphere
3 E the production of sugars 11 The photosynthetic event known as the Calvin cycle occurs in the A stroma B nucleus C thylakoid membrane D stomata E thylakoid compartment 12 The "photo-" part of the word "photosynthesis" refers to, whereas "- synthesis" refers to A the Calvin cycle the reactions in the stroma B the Calvin cycle the incorporation of carbon dioxide C the light reactions that occur in the thylakoids the incorporation of carbon dioxide into sugar D the light reactions reactions in the thylakoids E the reactions in the stomata the reactions in the thylakoid 13 The wavelengths of light absorbed by pigments in thethylakoid are mainly in which range? A blue-violet and red-orange B the infrared C the range absorbed by carotenoids D green, which is why plants are green E the entire spectrum of white light 14 The most important role of pigments in photosynthesis is to A release energy from glucose molecules B store energy in ATP C store energy in glucose molecules D capture light energy E screen out harmful ultraviolet rays 15 Which one of the following colors is most strongly reflected by chlorophyll?] A blue
4 B orange C red D green E yellow 16 Which of these wavelengths is LEAST useful for photosynthesis? A green B blue C yellow D orange E red 17 When chloroplast pigments absorb light, A the Calvin cycle is triggered B their electrons become excited C their photons become excited D they gain electrons E they lose energy 18 The reaction center, antenna molecules, and primary electron acceptors that cluster in the thylakoid membrane form which structure? A carbon incorporation unit B fluorescence center C photosystem D electron transport chain E electromagnetic spectrum
5 19 The synthesis of glucose by photosynthesis requires energy The source of the energy for the excited electrons is A light B carbon dioxide C water D chlorophyll E glucose 20 The light reactions of photosynthesis generate high-energy electrons, which end up in The light reactions also produce and A oxygen sugar ATP B water sugar oxygen C chlorophyll ATP NADPH D ATP NADPH oxygen E NADPH ATP oxygen 21 Where do the electrons needed by the water-splitting photosystem originate? A ATP B the electron transport chain C other chlorophyll molecules D water E light 22 The chlorophyll a molecule at the reaction center A passes an excited electron to G3P B receives excited electrons from carotenoids C passes an excited electron to a primary electron acceptor D passes an excited electron to the Calvin cycle E passes photon energy to chlorophyll b 23 During photosynthesis in chloroplasts, O 2 is produced from via a series of reactions associated with A H 2 O the water-splitting photosystem B CO 2 the water-splitting photosystem
6 C CO 2 Calvin cycle D CO 2 both the NADPH-producing photosystem and the Calvin cycle E H 2 O NADPH-producing photosystem 24 Light reactions do all of the following EXCEPT A convert sunlight to chemical energy B add electrons to CO 2 C absorb photons D convey excited electrons from chlorophyll to an electron acceptor E synthesize ATP and NADPH Both mitochondria and chloroplasts A are surrounded by a single membrane B reduce NAD +, forming NADP C release oxygen as a by-product D obtain electrons from water E use a H + gradient to produce ATP 27 The energy used to produce ATP in the light reactions of photosynthesis comes from A the burning of sugar molecules B splitting water C movement of H + through a membrane D incorporation of carbon E fluorescence 28 Which of the following correctly matches each of the inputs of the Calvin cycle with its role in the cycle? A carbon dioxide: high-energy electrons ATP: carbon NADPH: energy B carbon dioxide: hydrogen ATP: carbon NADPH: energy
7 29 30 C carbon dioxide: high-energy electrons ATP: energy NADPH: carbon D carbon dioxide: carbon ATP: energy NADPH: high-energy electrons E carbon dioxide: energy ATP: carbon NADPH: high-energy electrons The Calvin cycle is a series of reactions that A assemble sugar molecules by incorporating carbon B convert light energy to chemical energy C produce NADPH D all of the above E produce oxygen gas 31 Why is NADP + needed in photosynthesis? A It forms NADPH to be used in the Calvin cycle B It is the primary electron acceptor C It helps produce ATP from the light reactions D It forms part of the water-splitting photosystem E It absorbs light energy 32 You have a large, healthy philodendron that you carelessly leave in total darkness while you are away on vacation You are surprised to find that it is still alive when you return What has the plant been using for an energy source while in the dark? [ A None of these B When light energy is not available, plants can derive energy from inorganic molecules C While it did have access to light before you left, the plant stored energy in the form of sugars or starch, and it was able to derive energy from those during your vacation D Even though it can't carry out the light reactions, the plant can still produce sugars because the Calvin cycle doesn't require light E Even though the plant received no visible light, it was able to use the short-wave part of the electromagnetic spectrum (gamma rays and X- rays) to carry out photosynthesis
8 1 D 2 A 3 A 4 A 5 B 6 E 7 C 8 NO 9 D 10 B 11 A 12 C 13 A 14 D 15 D 16 A 17 B 18 C 19 A 20 E 21 D 22 C 23 A 24 B 25 no 26 E 27 C 28 D 29 NO 30 A 31 A 32 C 33
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