Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 20, Problem 19P
Interpretation Introduction
Interpretation:
The meaning and the cause of photorespiration are to be stated. The reason as to why photorespiration is believed to be wasteful is to be stated.
Concept introduction:
Photosynthesis is a reaction in which carbon dioxide and water combines together in the presence of sunlight to form glucose and oxygen. The photosynthetic process in which carbon is eliminated from
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Photosynthesis and Cell respiration:
A. What should happen to the O2 levels in a closed container containing a plant during the day? why?
B. And what happens to the O2 levels during the night (no light)? Why?
highest rate of photosynthesis?
3. Based on your observations, which wavelength (color) of light might be expected to generate the
General Questions:
1. Why are plants typically green?
2. Photosynthesis produces the oxygen (O2) on which all aerobic organisms depend for survival.
What other factors make photosynthesis essential to the maintenance of virtually all life on
earth?
3. In the experiment that tested the effect of light intensity on the rate of photosynthesis, we did not
run a control tube during the experiment. Why is a control important in an experiment? How
would you design a control for this experiment? Be specific
4. If during the experiment, you found that the control tube generated pressure and had a
measurable rate of "photosynthesis" just like the experimental tube did, what would this fact tell
you about the experiment?
Photosyntheis related question (s):
When protons move out of the thylakoid, are they moving up or down their concentration gradient? (From low to high concentration or from high to low concentration?)
What protein(s) facilitate the transport of protons out of the thylakoid?
We can write the formula for photosynthesis as follows:
6 H2O + 6 CO2 + light energy → C6H12O6 + 6 O2
How would you write a formula for the light reactions? Include ATP, ADP, NADP and NADPH as relevant?
How would you write a formula for the Calvin cycle? Include ATP, ADP, NADP and NADPH as relevant.
Chapter 20 Solutions
Biochemistry
Ch. 20 - Prob. 1PCh. 20 - Prob. 2PCh. 20 - Prob. 3PCh. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
Ch. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Prob. 13PCh. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - Prob. 19PCh. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27PCh. 20 - Prob. 28PCh. 20 - Prob. 29PCh. 20 - Prob. 30PCh. 20 - Prob. 31PCh. 20 - Prob. 32PCh. 20 - Prob. 33PCh. 20 - Prob. 34PCh. 20 - Prob. 35PCh. 20 - Prob. 36PCh. 20 - Prob. 37PCh. 20 - Prob. 38PCh. 20 - Prob. 39PCh. 20 - Prob. 40PCh. 20 - Prob. 41PCh. 20 - Prob. 42PCh. 20 - Prob. 43PCh. 20 - Prob. 44PCh. 20 - Prob. 45PCh. 20 - Prob. 46PCh. 20 - Prob. 47PCh. 20 - Prob. 48P
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- Modified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true In the process of photosynthesis, the red wavelength is emitted in a process called as phosphorescence.arrow_forwardModified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. Chlorophyll a that is bright green in color is the pigment that initiates the light dependent reactions of photosynthesisarrow_forwardModified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. A cyclic pathway runs in Photosystem I to make ATP. Here, electrons are cycled back to photosystem I and NADPH is formed.arrow_forward
- Modified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. Photorespiration is a photosynthetic process by which C3 plants take up oxygen in the light, give out some carbon dioxide, and does not produce ATP.arrow_forwardPhotosynthesis and Respiration: Explain the details of the light-independent reaction. Make sure to explain the role of ATP and NADPH and where this reaction takes place.arrow_forwardCan someone help me understand this. A student set up an experiment to show the effect of light color on photosynthesis in Elodea plants. She filled two test tubes with distilled water and placed a piece of Elodea in each of the tubes. She added a drop of phenol red, which turns red in a basic solution and yellow in an acidic solution. She blew in each tube before placing the volumeters on the top of the tube. Why did she blow into the tube? to add oxygen to the tube to add carbon dioxide to the tube to add carbohydrates to the tube to add sodium bicarbonate to the tubearrow_forward
- The light phase of photosynthesis at the molecular... Photosystem II r QUALI Watch on YouTube Q Search Answer the following questions using the virtual lab light phase video. Where do the electrons for the light reaction come from? How does light cause protons to be pumped? If photosystem 1 (the second photosystem in the chain) is mutated and does not work, will the plant still be able to provide ATP for the Dark reaction? SLO 2 LO M CSU 40 4+ 8 244 9 >11. Share 111 112 +arrow_forwardCan someone help me understand this. Which of the following is NOT a product of the light reaction? carbon dioxide oxygen NADPH ATP energy intermediates Also, can you include information as to what are the reactants and products of photosynthesis?arrow_forwardCreate a concept map for this. Include all terms. “Photo” Portion of Photosynthesis (“Light Reactions”): Chloroplast, Grana, Thylakoid, Sunlight, Chlorophyll, Photosystem II(ETC), Photosystem I (ETC), High Energy electrons, Proton Gradient, ATP, NADPH, Water, Oxygen, Hydrogen Ions (H+), ADP, NADP+ Use all terms listed. Make as many connections as you can. Be sure your maps are clear.arrow_forward
- Modified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. Plants use light energy mostly in the invisible light range for photosynthesis.arrow_forwardAueshion-a Give the LETTER and NAME of the: 3.2.1 Specialized cell in which photosynthesis takes place 3.2.2 Part through which transpiration takes place 3.2.3 Organelle that contains chlorophyll Grandarrow_forwardOdd man out. Which of the following is not a component of chloroplasts? a. Thylakoid membrane b. Stromal lamellae c. Cristae d. Granumarrow_forward
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Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY