photosynthesis 1. In most plants the process of photosynthesis occurs most rapidly when the plants are exposed to equal intensities of

Transcription

1 Name: ate: 1. In most plants the process of occurs most rapidly when the plants are exposed to equal intensities of A. green and red light. blue and red light 4. Most of the oxygen that enters the atmosphere results from the process of A. respiration. fermentation. transpiration.. yellow and orange light. green and yellow light 2. uring the photochemical reactions that occur during, light energy is used primarily to A. chemically combine carbon and oxygen. chemically combine hydrogen and carbon dioxide. split water into hydrogen and oxygen 5. An important function of chlorophyll molecules during is A. absorbing and storing water in root cells. converting water into carbon dioxide. absorbing certain wavelengths of light energy. converting chemical bond energy to light energy. split methane into glucose molecules 3. The raw materials used by green plants for are A. oxygen and water. oxygen and glucose. carbon dioxide and water 6. Which process is the source of most of the oxygen in the atmosphere? A. aerobic respiration. fermentation. transpiration.. carbon dioxide and glucose page 1

2 7. Phase 2 is also known as the A. photochemical reaction. aerobic phase of respiration. carbon-fixation reaction. anaerobic phase of respiration 8. The process represented by the equation shown occurs within cells of which organism? 12H 2 O + 6O 2 energy enzymes 6 H 12 O 6 + 6H 2 O + 6O 2 A. a human. a grasshopper. a bean plant. a mushroom 9. In the reactions of, simple sugar molecules are manufactured in the A. chloroplasts. mitochondria. stomates. vacuoles 10. Select the process, chosen from the list below, that is best described by the statement shown. The process in which light energy is absorbed and PGAL synthesized A.. alcoholic fermentation. aerobic respiration. lactic acid fermentation page 2

3 11. The gas produced as a result of plant respiration can be used in. When no is taking place within the plant, this gas is 14. The graph shown relates the rate of in a geranium plants to varying conditions of temperature and light intensity. A. no longer produced. stored in the epidermis. dissolved in water and transpired. released through stomates and lenticels 12. Which word equation represents a process that requires the presence of light and chlorophyll? A. glucose + glucose maltose + water. water + carbon dioxide glucose + water + oxygen. glucose + oxygen carbon dioxide + water. glucose alcohol + carbon dioxide The relative rate of is greatest under which conditions of light intensity and temperature? A. low light intensity at 25. low light intensity at 35. high light intensity at 25. high light intensity at Select the reactions of, chosen from the list below, that is best described by the statement shown. Water molecules are split. A. Photochemical reactions, only. arbon-fixation reactions, only. oth photochemical and carbon-fixation reactions. Neither photochemical nor carbon-fixation reactions. 15. At a low light intensity, an increase in temperature will A. greatly slow down the rate of. greatly speed up the rate of. have little effect on the rate of. have no effect on the rate of page 3

4 16. The rate of is reduced at temperatures above 40 because A. chlorophyll cannot absorb light that is too intense. enzymes are denatured by excessive heat. the light becomes too intense. water evaporates too slowly 19. A student performed an investigation to determine if the rate of in elodea, an aquatic plant, is affected by a higher than normal concentration of carbon dioxide gas in the water in which the plant is growing. After increasing the concentration of carbon dioxide in water, the student illuminated the plant and collected the bubbles of oxygen gas that were given off from the cut end of the submerged plant. In this investigation, what would be the best indicator of the rate of? A. a change in the color of the plant. an increase in the length of the elodea plant over a period of 12 hours 17. Which organelles must be present within a cell of a geranium leaf for respiration and to occur?. the amount of light that is transmitted through the water. the amount of oxygen collected over a period of 12 hours A. cell wall and lysosome. mitochondrion and chloroplast. centrosome and nucleus. endoplasmic reticulum and ribosome 20. The diagram outlines some of the steps in the chemical synthesis of carbohydrates in plants. Phase I reactions take place in organelles known as 18. Photosynthesis is the process by which A. the potential energy of glucose is transferred to ATP molecules. glucose is gradually broken down to form lactic acid or alcohol. two glucose molecules combine to form maltose and water. light energy is converted into the chemical energy of glucose A. vacuoles. chloroplasts. ribosomes. mitochondria page 4

5 21. The diagram outlines some of the steps in the chemical synthesis of carbohydrates in plants. The immediate source of energy for the phase II reactions is A. O 2. 6 H 12 O 6. PGAL. ATP page 5

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