PHOTOSYNTHESIS STARTS WITH

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1 Name Date Period PHOTOSYNTHESIS STARTS WITH 1. Molecules that collect light energy are called _P. 2. Chlorophyll a and b absorb _B -_V and _R wavelengths of light best. 3. _C is the main light absorbing pigment found in green plants. 4. Plants look green because chlorophyll _R green light. 5. Organisms, like green plants, that can make their own food using energy from the sun are called _A. 6. The gel-filled space inside the chloroplast surrounding the thylakoid stacks is called the _S. 8. The light dependent reactions, take place in the _T space. 9. The enzymes for the light dependent reactions are found in the _T M, while the Calvin cycle happens in the _S. 10. The stacks of thylakoids found inside chloroplasts are called _G. 11. The light independent reactions are also called the _C _C. 12. Carbon and oxygen from _C _D end up as part of a _G molecule following the Calvin cycle. 13. _A and _N are made during the _L dependent reactions and carry energy and high energy electrons that are used during the Calvin cycle to produce _S, like glucose. 14. The O in H 2 O is given off as_o gas to the atmosphere when water is split during the light dependent reactions. 15. Proteins in living things that help chemical reactions happen are called _E. 17. Orange and yellow colored pigments called _C absorb different wavelengths of light and help chlorophyll use more of the sun s energy. 18. _T, amount of _W, and _L intensity are all factors that affect the rate of photosynthesis. 1

2 * * * * * * * * * * * * * * ENERGY AND LIFE MULTIPLE CHOICE: CIRCLE ALL THE STATEMENTS THAT ARE TRUE OR COMPLETE THE STATEMENT. THERE MAY BE MORE THAN ONE CORRECT ANSWER. 1. What is the stored form of energy? A. ADP B. water C. glucose D. adenine 2. All organisms get the ENERGY they need to regenerate ATP from A. phosphates B. foods like glucose C. organelles D. ADP 3. Which of the following are TRUE about ATP? A. ATP consists of ribose sugar, adenine, and 3 phosphate groups B. ADP forms when ATP loses a phosphate and releases energy. C. Used ATP is discarded by the cell as waste. D. ATP provides energy for active transport in cells. What is it called? DESCRIPTION GIVE 2 EXAMPLES Organisms that can make their own food Organisms that obtain energy from the food they eat What is the ultimate source of energy autotrophs use to produce their own food? On the line below each picture, classify the organism as either an AUTOTROPH or a HETEROTROPH. 2

3 NAME THE CHEMICAL COMPOUND SHOWN BELOW THAT CELLS USE TO STORE ENERGY. LABEL THE PARTS THAT MAKE UP THIS MOLECULE: Reading on Page 54 A= B= C= WHAT DOES ATP STAND FOR? A T HOW MANY PHOSPHATES ARE IN ONE MOLECULE OF ADP? HOW IS ATP MADE FROM ADP? USE the words: ENERGY STORING and ENERGY RELEASING to label what is happening in the reactions shown below: Name 3 cellular activities that use the energy stored in ATP: 3

4 * * * * * * * * * * * * * * PHOTOSYNTHESIS: An Overview CIRCLE ALL THAT ARE TRUE. 1. Plants gather the sun s energy with light-absorbing MOLECULES called. A. thylakoids B. pigments C. chloroplasts D. glucose 2. Chlorophyll absorbs light very well in the regions of the visible spectrum. (Circle all that are true) A. blue-violet B. green C. red D. yellow 3. Most plants appear green because chlorophyll. A. reflects green light B. absorbs green light 4. A student conducts an experiment by collecting the gas given off by a green plant in bright sunlight at room temperature. The gas being collected is probably. A. ATP B. water vapor C. carbon dioxide D. oxygen Write the complete overall chemical equation for photosynthesis using chemical symbols instead of words: + + How many molecules of carbon dioxide (CO 2 ) are used to make 1 molecule of glucose (C 6 H 12 O 6 )? In addition to water and carbon dioxide, what two things are required for photosynthesis to happen? and * * * * * * * * * * * * * * 4

5 REACTIONS OF PHOTOSYNTHESIS MULTIPLE CHOICE: Circle the letter of the answer that best completes the statement or answers the question. 1. What are stacks of thylakoids called? A. stroma B. Stomata C. Grana D. chlorophyll 2. The Calvin cycle is another name for A. photosynthesis B. the electron transport chain C. light-dependent reactions D. light-independent reactions 3. CIRCLE ALL THAT ARE TRUE about the LIGHT DEPENDENT REACTION. A. High-energy electrons move through the electron transport chain. B. Pigments in photosystems II and I absorb light. C. ATP synthase helps H + ions in the thylakoid space to pass through the membrane to the stroma. D. ATP and NADPH are used to produce high-energy sugars. 4. CIRCLE ALL THAT ARE TRUE about the CALVIN CYCLE A. ATP is produced by ATP synthase and oxygen is released B. It is also called the light-independent reaction. C. ATP and NADPH from the light-dependent reactions are used here D. High energy sugar compounds are made from CO 2 5. Which step is the beginning of photosynthesis? A. Glucose is made. B. Light is absorbed. C. High energy electrons move through the electron transport chain. D. ATP and NADPH produce high energy sugars. 6. CIRCLE ALL OF THE FOLLOWING THAT ARE FOUND INSIDE THE THYLAKOID MEMBRANE. A. electron transport chain B. photosystem I C. photosystem II D. ATP synthase 7. Which molecule acts as a carrier for high energy electrons during photosynthesis? A. ATP B. H 2 O C. NADP + D. CO 2 5

6 8. How is the Calvin cycle different from the light-dependent reactions? A. It takes place in chloroplasts. B. It takes place in the stroma. C. It requires light. D. It takes place in the thylakoid membrane 9. Oxygen produced during the light-dependent reaction is. A. used in the Calvin cycle to make sugar B. joined with the NADPH to make water C. is released into the atmosphere D. None of these, oxygen is NOT produced by the light-dependent reaction * * * * * * * * * * * * * * Name 4 factors that affect the rate at which photosynthesis occurs MODIFIED TRUE or FALSE Circle T if the statement is TRUE. Circle F if the statement is FALSE and use the blank provided to correct the underlined word/phrase. T F Increasing light intensity decreases the rate of photosynthesis. T F Carbon dioxide molecules enter the light-dependent reactions from the atmosphere. T F Photosynthesis uses energy from ATP and high energy electrons from NADPH produced in the light-dependent reactions to make glucose in the Calvin cycle. T F The light-dependent reaction produces ATP, NADPH, and carbon dioxide. USE THE LETTERS IN THE DIAGRAM AT THE LEFT TO IDENTIFY: stroma thylakoid granum * * * * * * * * * * * * * * 6

7 USE WORDS FROM THE WORD BANK TO FILL IN THE CHART COMPARING AND CONTRASTING THE LIGHT-DEPENDENT REACTIONS AND THE CALVIN CYCLE: (You can use them more than once!) in stroma in thylakoid membrane O 2 ATP CO 2 H 2 O NADPH Requires light Doesn t require light SUGARS (glucose) LIGHT-DEPENDENT REACTIONS CALVIN CYCLE LOCATION REACTANTS PRODUCTS LIGHT? THINK ABOUT IT Which of these graphs represents the effect of temperature on the rate of photosynthesis? (Hint: Many molecules that help with photosynthesis are enzymes) EXPLAIN YOUR ANSWER. Which of these graphs represents the effect of light intensity on the rate of photosynthesis? EXPLAIN YOUR ANSWER. 7

8 CELLULAR RESPIRATION MULTIPLE CHOICE. Circle ALL that are TRUE. There may be MORE THAN one correct answer. is the first step in cellular respiration that begins releasing energy stored in glucose. A. Alcoholic fermentation B. Lactic acid fermentation C. Glycolysis D. Electron transport chain The carriers for energy and high energy electrons during GLYCOLYSIS are. A. ATP B. NADH C. FADH 2 D. NADPH If oxygen is NOT present, glycolysis is followed by A. Krebs cycle B. electron transport chain C. fermentation Name the 3 carbon molecule produced when glucose is broken in half during glycolysis. A. pyruvic acid B. lactic acid C. Acetyl-CoA D. citric acid Since fermentation does not require oxygen it is said to be. A. aerobic B. anaerobic Which high energy electron carrier is regenerated during fermentation that allows cells to continue to make ATP using glycolysis? A. NAD + B. NADPH C. ATP D. ADP How many ATP molecules are added to get glycolysis started? Since glycolysis produces 4 ATP molecules, this results in a NET GAIN of ATP s 8

9 Write the complete overall chemical equation for cellular respiration using chemical symbols instead of words: Compare this reaction to the one you learned about last chapter for PHOTOSYNTHSIS (6 H 2 O + 6 CO 2 + light energy C 6 H 12 O O 2 ) How are these equations related? Write in words the equations for the two kind of fermentation: Alcoholic fermentation Lactic acid fermentation + + * * * * * * * * * * * * * * * Tell the kind of fermentation used in each example: Yeast use this to make bread dough rise Your muscle cells use this during rapid exercise when oxygen is low Bacteria and yeast use this to make beer and wine Bacteria use this to make cheese, yogurt, and sour cream If alcoholic fermentation is used to make bread dough rise, how come you don t become intoxicated when you eat the bread? The Krebs Cycle and Electron Transport Chain MULTIPLE CHOICE: Circle the answer or answers that best complete the statement or answer the question. (THERE MAY BE MORE THAN ONE RIGHT ANSWER.) Which of the following shows the correct sequence during cellular respiration? A. Electron transport chain glycolysis Krebs cycle B. Glycolysis Electron transport chain Krebs cycle C. Krebs cycle Electron transport chain glycolysis D. Glycolysis Krebs cycle Electron transport chain 9

10 Where do the carbon atoms in pyruvic acid end up following the Krebs cycle? A. They enter the electron transport chain and make ATP B. They become part of a carbon dioxide molecule and end up in the atmosphere C. They join with citric acid to make Acetyl-CoA D. They build up in the intermembrane space Because cellular respiration requires oxygen it is said to be A. aerobic B. anaerobic How many total ATP molecules are produced by 1 molecule of glucose completing cellular respiration? WHICH OF THE FOLLOWING ARE PRODUCED DURING THE KREBS CYCLE? A. ATP B. NADH C. FADH 2 D. CO 2 What molecule is the final electron acceptor at the end of the Electron transport chain? A. oxygen B. carbon dioxide C. glucose D. NADH Which stage of cellular respiration produces the most ATP? A. glycolysis B. Krebs cycle C. Electron transport D. Acetyl-CoA charging Which of the following happens as electrons pass down the Electron Transport chain? A. Energy from the moving electrons transports H + ions into the intermembrane space B. Carbon dioxide is released C. Energy from H + ions crossing back into the matrix causes ATP synthase to make ATP. D. Water is produced Name the 6 carbon molecule that forms when Acetyl-CoA joins its 2 carbons to a 4 carbon molecule during the Krebs cycle. A. ATP B. pyruvic acid C. glucose D. citric acid 10

11 CELLULAR RESPIRATION VOCABULARY REVIEW 1. is a 6 carbon molecule that is produced first when acetyl-coa joins with a 4 carbon molecule to enter the Krebs cycle. 2. is the process of splitting a glucose molecule into 2 pyruvic acid molecules. 3. The molecule used by cells to store and transfer energy is. 4. Glycolysis happens outside the mitochondria in the of the cell. 5. happens when oxygen is present and includes glycolysis, Krebs cycle, and Electron transport. 6. This describes a process that requires oxygen = 7. This high energy electron carrier produces fewer ATP s than NADH as its electrons pass through the Electron Transport Chain because it enters farther down the chain a. = 8. This atmospheric gas is required for aerobic respiration =. 9. This describes a process that does NOT require oxygen; it means without air a. = 10. Type of fermentation used by human muscles in low oxygen conditions and microorganisms to make yogurt, cheese, pickles, sauerkraut and kimchi. = 11. As electrons pass down the electron transport chain, H + ions build up in the a. space. 12. The cycle breaks down pyruvic acid into carbon dioxide and produces NADH, FADH 2, and ATP. 13. The NADH and FADH2 produced during the Krebs cycle pass their electrons down the 14. chain to produce ATP. 15. The passage of H + ions through causes it to spin and produce ATP. 16. This 3 carbon molecule is produced during glycolysis when glucose splits in half a. = 17. Cell organelle which acts as the cell s power plant to burn glucose and store energy as ATP a. = 18. If oxygen is NOT present, glycolysis is followed by. 11

12 19. Type of fermentation used to make bread dough rise and produce beer and wine. a. = 20. This molecule has the formula C 6 H 12 O 6 and is split in half during glycolysis = 21. The carbon atoms in pyruvic acid end up as in the atmosphere following the Krebs cycle The folded inner membranes inside a mitochondrion are called. 23. This molecule reacts with pyruvic acid to release C0 2, produce NADH, and acetyl-coa. a. = 24. forms when Coenzyme A attaches to two carbons from pyruvic acid. 25. is the storage form of glucose used by animal cells which can be broken down for energy when glucose is used up. 26. The area inside the cristae where the Krebs cycle happens is the. LABEL &/OR EXPLAIN THE FOLLOWING DIAGRAM: 12

13 Name of process? Where it occurs? What s split? Aerobic or anaerobic? Net ATP made? Where cycle occurs? Aerobic or anaerobic? Gas produced Energy carriers made? Name of Cycle? Where Occurs? What is made? NADH + FADH 2 From Krebs ENTER Name of Process? Where it occurs? Gas used? Substance made? Net ATP? 13 O 2? + 36 ATP

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