Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 3AC
Assume you want to add an accessory pigment to the photosystems of a plant chloroplast to help it photosynthesize more efficiently. What wavelengths of light would the new pigment absorb? Describe the color of your new pigment. Would this be a useful project for genetic engineers? Explain.
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In the photosynthesis lab, a group of students found that in the blue light condition, there was a change in absorbance (ΔA620) of 0.324 in extracted spinach chloroplasts. The students later went on a hike and located a plant they had never seen before and were interested in how the photosynthesis rates would compare to their experiment with spinach chloroplasts. They extracted chloroplasts of the unknown green-leaved plant and exposed them to the same experimental conditions as before. The students calculated the ΔA620 to be 0.100.
Which plant (spinach or unknown) has the highest rate of photosynthesis? Explain your answer using evidence, being sure to demonstrate your understanding of the dependent variable.
You recently join a lab where professor is looking for photosystem of plants. He told you to isolate chloroplast and look for the photosystem II. Please select the correct sequence of events you are going to perform.
options:
Homogenize leaves à differential centrifugation à Fractional Solubilization à Affinity purification
Homogenize leaves à Fractional Solubilization à differential centrifugation à Affinity purification
Differential centrifugation à Homogenize leaves à Fractional Solubilization à Affinity purification
Affinity purification à differential centrifugation à Fractional Solubilization à Homogenize leaves
There are two photosystems involved in the light reaction of photosynthesis. Both take upenergy from the sun in the form of light.A. Where are the photosystems located and what is the name of the organelle?
B. Where does the energy that the photosystems take up, go? Describe for eachphotosystem WHERE the energy ends up at the end of the light reactions. In otherwords, what products contain the energy from which photosystem at the end ofthe light reaction?
Chapter 7 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 7.1 - What chemical reactions allow plants to capture...Ch. 7.1 - explain why photosynthesis is important?Ch. 7.1 - diagram the structure of leaves and chloroplasts...Ch. 7.1 - write out and explain the basic equation for...Ch. 7.1 - summarize the main events of the light reactions...Ch. 7.2 - What reactions allow plants to store the...Ch. 7.2 - list the light capturing molecules in chloroplasts...Ch. 7.2 - Prob. 1HYEWCh. 7.2 - You continuously monitor the photosynthetic oxygen...Ch. 7.2 - diagram and describe the molecules within the...
Ch. 7.2 - Prob. 3CYLCh. 7.3 - What global policy changes and what individual...Ch. 7.3 - describe the function of the Calvin cycle and...Ch. 7.3 - Why do C3 plants have an advantage over C4 plants...Ch. 7.3 - list the three stages of the Calvin cycle,...Ch. 7.3 - FIGURE E7-3 Corn prices have increased...Ch. 7.3 - describe the fate of the simple sugar G3P...Ch. 7 - Suppose an experiment is performed in which plant...Ch. 7 - Plant leaves contain pores called __________ that...Ch. 7 - Which of the following is True? a. Photosynthesis...Ch. 7 - Explain what would happen to life if...Ch. 7 - Prob. 2ACCh. 7 - Chlorophyll a captures wavelengths of light that...Ch. 7 - The Calvin cycle a. can only occur when light is...Ch. 7 - Prob. 2RQCh. 7 - Assume you want to add an accessory pigment to the...Ch. 7 - Prob. 3FIBCh. 7 - Prob. 3MCCh. 7 - Draw a simplified diagram of a leaf cross-section...Ch. 7 - Prob. 4FIBCh. 7 - Prob. 4MCCh. 7 - Draw a simplified diagram of a chloroplast and...Ch. 7 - Prob. 5FIBCh. 7 - Which of the following is False? a. Photosystem II...Ch. 7 - Prob. 5RQCh. 7 - Light reactions generate the energy-carrier...Ch. 7 - Prob. 6RQCh. 7 - Prob. 7RQ
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- For most plants, two distinct photosystems (Photosystem I and Photosystem II) work together in series during photosynthesis. These photosystems are complexes of proteins and pigment molecules. Statement 1: Photosystem I has an absorption maximum of 680 nm, whereas Photosystem II has an absorption maximum of 700 nm. Statement 2: The special pair of chlorophyll a molecules in the reaction center of photosystem I is designated as P700, whereas the special pair of chlorophyll a molecules in the reaction center of photosystem II is designated as P680. Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false.arrow_forwardIdentify which of the following statements is a lie? Select one: a. Even if plants have red leaves, they still perform photosynthesis. b. Photosynthesis is vital in plants to produce food and energy they need for growth and cellular respiration. Therefore, all plants need the same amount of sunlight to make enough food to grow. c. Aside from chlorophyll α and chlorophyll b in plants, plants also have carotenoids, which help plants absorb light energy for use in photosynthesis.arrow_forwardvisit: https://www.youtube.com/watch?v=EMNFZnDt75c Attempt to identify the single cup-shaped chloroplast containing the eyespot for phototaxis (phototaxis: moving toward or away from light). This will be a different color than the rest of the cell. What color is it?arrow_forward
- In 1770, Joseph Priestley performed a series of experiments to determine the reactants and products of photosynthesis. The diagram below shows the experimental conditions and results of two experiments performed by Priestley, named here as Experiment 1 and Experiment 2. From his experiments, Priestley concluded that plants restore to the air whatever breathing animals and candles remove. Joseph Priestly Photosynthesis Experiments and Results Experiment Results: - candle extinguished (went out) 1 - mouse died Experiment 2 Results: candle continued to burn mouse stayed alive Note: Experiment 1 and Experiment 2 were both performed in the presence of sunlight. The substance produced by the plant in Experiment 2, that keeps the candle burning and the mouse alive is O CO2 O 02 O H2O O C6H1206arrow_forwardIf I wanted to maximize the rate of photosynthesis in plants, should I expose them on Low Light or moderate?arrow_forwardCompare the light-dependent reaction with the light-independent reaction. Type of Reaction Description Location in Chloroplast Light-dependent Light-independentarrow_forward
- An experiment was done to determine how color of light and distance affects photosynthetic activity of the pond weed. Pond weed was placed in a test tube containing a solution of sodium hydrogen carbonate, and had its end cut; light was placed 50 cm away and four colors were tested (clear, red, blue, and green). After placing the light, the pondweed was given a certain amount of time to adjust before counting the bubbles, bubbles were counted for 1, 3, and 5 minutes. Only the bubbles that came out of the cut end was counted to represent the rate of photosynthesis. Below is the tabulated results. What are the possible factors or errors that could have affected clear/white light to have lower photosynthetic activity? In theory this should have the highest rate.arrow_forwardIf you landed on a planet where all of the plants had purple leaves, what wavelengths of light would you expect to be least effective for photosynthesis? explain your reasoning.arrow_forwardIf you are planning an experiment to show the effect of light on photosynthesis (i) Will you select white light or green light? Justify your answer. (ii) Why would you select a destarched plant.arrow_forward
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