Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 12P
If a photosynthetic organism is illuminated in a closed, sealed environment, it is observed that the C02 and 02 levels in the surrounding atmosphere reach a constant ratio.
a. Suggest an explanation.
b. What factor would you think primarily determines the value of this ratio?
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Students have asked these similar questions
Suggest a reason why photosynthetic pigments readily absorb in the blue region of the visible spectrum but do so with low probability in the ultraviolet.
If a photosynthetic organism is illuminated in a closed, sealed environment,
it is observed that the CO, and O, levels in the surrounding atmosphere
reach a constant ratio.
(a) Suggest an explanation.
(b) What factor would you think primarily determines the value of this
ratio?
A. Explain the role of ATP in life process.
B. Complete the following table by comparing and
contrasting the light-dependent and light-independent
reactions of photosynthesis.
You may use the link below for reference.
https://youtu.be/KfvYQgT2M-k
Light-
independent
reactions
Point of
Light-dependent
reactions
Comparison
1. Raw materials
2. Part of the
chloroplasts
where they occur
3. Light
requirements
4. Products
15. Ву-products
Chapter 15 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.Similar questions
- You performed an experiment on photosynthesis on Elodea, using bromothymol blue as an indicator forpH. Your two light conditions were red light and blue light. You found that in blue light, your solutionturned a nice cobalt blue, and in red light it turned green.a. What can you conclude about the efficiency of photosynthesis in Elodea regarding those twowavelengths?b. What would your conclusion be if your negative control (no Elodea in white light) turned greenalso?arrow_forward1) If we put a photosynthetic organism in a closed, sealed environment and shine a light on it, we observe that the CO2 and O2 levels in the container reach constant levels. a) Explain why this would occur. b) What factor/value would you expect to be the primary determinant of this value?arrow_forwardIf a photosynthetic organism is illuminated in a closed, sealed environment,it is observed that the CO2 and O2 levels in the surrounding atmospherereach a constant ratio.(a) Suggest an explanation.(b) What factor would you think primarily determines the value of this ratio?arrow_forward
- Four species in the Chenopodiaceae were found to have one cell C4 photosynthesis. Givee 3 biochemical properties that could establish that these are C4 plants rather than C3 plants. For each property, describe and explain the test result or data you would expect if the plant is C4 rather than C3.arrow_forwardRead and analyze the following statements. (i) One of the end products of photosynthesis is the raw material for respiration. (ii) One of the end products of respiration is the raw material for photosynthesis. A. (i) is wrong and (ii) is correct B. both (i) and (ii) are correct C. both (i) and (ii) are wrong D. (i) is correct and (ii) is wrongarrow_forwardVisit the companion website at www.oup.com/us/mckeeto read the Biochemistry in Perspective essay entitledPhotosynthetic Studies. Then describe the Emersonenhancement effect. How was it used to demonstrate the existence of two different photosystems?arrow_forward
- Over the past decades, the CO2 concentration in the atmosphere has increased. a. Predict the effect of increasing carbon dioxide concentrations on photorespiration. b. Scientists suggest that increasing CO2 concentrations are leading to higher average global temperatures. If temperatures are increasing, does this change your answer to part (a)?arrow_forwardYou are a marine biologist sampling an offshore ecosystem. One day, you find a red organism floating in one of your nets. It has structures that resemble the leaves and stems of a plant. You hypothesize that this organism might be photosynthetic. Describe how you could test this hypothesis using a pH indicator solution. a. In detail, describe the steps you would take and the reactants of photosynthesis required. b. What change in pH would indicate that the organism was undergoing photosynthesis, and how would the indicator respond?arrow_forwardGiven an equal amount of photons, what is the order of increasing effectiveness of blue, red, green, and white light (combination of the three main wavelengths) on photosynthetic activity?arrow_forward
- If 30 molecules of CO2 enter the Calvin Cycle,a. How many molecules of phosphoglycerate (PGA) will be produced? b. How many molecules of glyceraldehyde phosphate (PGAL) leave the cycle? c. How many molecules of ribulose bisphosphate (RuBP) will be produced? d. How many molecules of ATP will be utilized?arrow_forward2c. 2d. We know that most pigments are found in the chloroplasts of eukaryotic cells. Specifically WHERE is chlorophyll located in the chloroplast? Some PROKARYOTES are photosynthetic. Predict where the pigments might be located in these cells. Activity #3. Determining optimal wavelength of light used during spinach leaf photosynthesis Note: You'll need to read through this lab exercise and your textbook to answer these questions. Answer choices for questions #1-4 (Each answer can be used more than ADP ATP CO₂ Glucose H₂O Light NADP+ NADPH 0₂ 3. Which of the above are directly required by the light reactions? Hint: See the photosynthesis chapter in your textbook. 4. Which of the above are directly produced by the light reactions? 5. Which of the above are directly required by the Calvin cycle? 6. Which of the above are directly produced by the Calvin cycle? 11 7. (a) In our experiment, what will cause the leaf discs to float? (b) The greater the number of floating discs, the (greater…arrow_forwardPhotosynthesis is defined as the chemical process, wherein carbon dioxide in the presence of water and radiant energy gets converted to glucose (chemical energy), giving out oxygen as byproducts. In the equation, the combining reactants and resulting products are expressed along with their respective numbers of molecules. Putting this in a simplified formula, the following equation represents this process. CO2 + H2O + Light energy → C6H12O6 + O2 Considering this equation, how plant lovers (plantitos and plantitas) able to cultivate their plants?arrow_forward
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