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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Chapter 7, Problem 2AC
Summary Introduction
To describe:
Whether the
Introduction:
The chloroplasts are double-membrane bound organelles, which contain pigments known as the chlorophylls, which carry out photosynthesis in the autotrophic organisms. These are present in the mesophyll cells of the leaf. In the stroma of chloroplast, stacks of thylakoids are present which are known as grana. Inside the thylakoids, there are clusters of proteins are photosynthetic pigments present.
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The loss of water from a plant by transpiration cools the leaf. Movement of water in transpiration requires both adhesion to the
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In a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment.
Source of Fluid
pH
(mean)
Standard Error of Mean (SEM)
Stroma
8.2
0.75
Inner compartment of thylakoid
5.6
0.35
Describe the stages of photosynthesis. Explain the need for a constant supply of inorganic carbon dioxide.
Three plants grow side by side in a pond. Glucose and starch are measured for each and shown in relative units below, along with the pH of the vacuole at dawn and at noon.
Plant
Glucose
Starch
Vacuolar pH, dawn
Vacuolar pH, noon
A
100
50
1
4
B
100
10
4
4
C
1,000
2
4
4
Part A:Explain what kind of photosynthesis is being done by each plant with some details about how each works. Justify your answer.
Part B:Decipher which plant is biochemically defective after the light-independent reactions and explain how you deciphered this.
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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- 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_forwardIn a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment. Source of Fluid pH (mean) Standard Error of Mean (SEM) Stroma 8.2 0.75 Inner compartment of thylakoid 5.6 0.35 Explain the reason for the differences in pH between the stroma and the thylakoid lumen.arrow_forwardSuppose we set up a system in a lab where plants are automatically injected with all the glucose they need to survive. What part of photosynthesis would the plants no longer need to perform? Group of answer choices a)ETC 1 b)the entire dark reaction c)the entire light reaction d)P700 e)all of itarrow_forward
- Suppose that you are measuring CO2 exchange by a leaf. During the time period of your measurement, 1.10E+7 molecules of glyeraldehyde phosphate (PGAL) are made from CO2 in photosynthesis and 4.00E+6 molecules of glucose are used in cellular respiration. How many net molecules of CO2 would you detect being taken up by the leaf in your measurement?arrow_forwardWhat would be the effect on production of ATP from photosynthesis, assuming no effect on enzyme/protein stability, if the pH of the chloroplast stroma were lowered? a) It would increase b) It would decrease c) It would stay the samearrow_forwardIn 1966, André Jagendorf and Ernest Uribe directly tested whether artificial proton gradients in isolated chloroplasts could support the generation of ATP without redox energy or light. Chloroplasts were suspended in the dark in low-pH buffer and allowed to equilibrate. When the buffer was changed to a higher pH and ADP and radiolabeled phosphate (32P) were added, 32p-labeled ATP accumulated in the stroma. Answer the following questions on the basis of the results of this experiment: pH 4 ++K o comune OpH 111 7!!! o↓ Measure amount of sip.ATP synthesized Allow to equilibrate OC. 8 OD. 6 Add ADP and p Choose one: ⒸA. 16 OB. 12 Which of the following is a true representation of the experimental design and results? B. Choose one: A. In order for ATP to be synthesized, the concentration of protons must be higher in the lumen than in the surrounding chloroplast solution. OB. ATP was used as an energy source to pump protons from the lumen into the stroma. OC. The proton-motive force…arrow_forward
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