Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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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.
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?
A group of scientists wants to test the effect of different wavelengths of light on plant photosynthesis. They have 3 treatment groups: red light, green light, and no light. They choose red light because
chlorophyll has been shown to absorb red light. They choose green light because chlorophyll has been shown to reflect green light. They choose no light as a negative control to examine the rate of
photosynthesis in the absence of light. To measure photosynthetic rate, the scientists use sensors to measure oxygen production of plants exposed to the different light treatments.
Choose the best scientific hypothesis:
O Photosynthesis is a critical process for plants, and it is of great importance that we understand how it is impacted by different wavelengths of light.
O If rate of oxygen production is higher under red light than it is under green light or no light, it proves that red light has the largest effect on photosynthesis.
O Because chlorophyll absorbs red light, rate of oxygen…
Chapter 7 Solutions
Biology
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 - You continuously monitor the photosynthetic oxygen...Ch. 7.2 - Prob. 1HYEWCh. 7.2 - What reactions allow plants to store the...Ch. 7.2 - list the light capturing molecules in chloroplasts...Ch. 7.2 - diagram and describe the molecules within the...
Ch. 7.2 - Prob. 3CYLCh. 7.3 - Prob. 1TCCh. 7.3 - describe the function of the Calvin cycle and...Ch. 7.3 - list the three stages of the Calvin cycle,...Ch. 7.3 - describe the fate of the simple sugar G3P...Ch. 7.3 - Prob. 2TCCh. 7.3 - What global policy changes and what individual...Ch. 7 - Which of the following is True? a. Photosynthesis...Ch. 7 - The Calvin cycle a. can only occur when light is...Ch. 7 - Prob. 3MCCh. 7 - Prob. 4MCCh. 7 - Which of the following is False? a. Photosystem II...Ch. 7 - Prob. 1FIBCh. 7 - Chlorophyll a captures wavelengths of light that...Ch. 7 - Prob. 3FIBCh. 7 - Prob. 4FIBCh. 7 - Light reactions generate the energy-carrier...Ch. 7 - Explain what would happen to life if...Ch. 7 - Prob. 2RQCh. 7 - Draw a simplified diagram of a leaf cross-section...Ch. 7 - Draw a simplified diagram of a chloroplast and...Ch. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - Suppose an experiment is performed in which plant...Ch. 7 - Prob. 2ACCh. 7 - Assume you want to add an accessory pigment to the...
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