Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 11, Problem 11.7PS
Summary Introduction
To explain: The reason why the photosynthetic efficiency is far lower than the estimated maximum photosynthetic efficiency.
Introduction: It has been estimated that under laboratory conditions, the maximum photosynthetic efficiency for the conversion of red light, carbon dioxide and water to glyceraldehyde is around 31%. However, in reality, it has been observed that photosynthetic energy transduction efficiency is around 5% or lesser than 5%.
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Chemiosmosis. ATP synthesis in chloroplasts is usually light dependent; it does not happen in the dark.
When researchers shifted isolated chloroplasts from a low pH solution to a more alkaline (higher pH) solution, ATP synthesis occurred even in the absence of light! This was an experiment used to support the chemiosmosis mechanism of ATP formation in chloroplasts. Why?
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If these experiments were performed in mitochondria instead of chloroplasts, what results would we expect?
photosynthesis.
Historical Discovery Process
The chemical changes that occur during photosynthesis have been
investigated for the past 300 years. The general highlights of these
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Three centuries ago people wondered where plants came from. They
knew that plants grew out of the ground, but how that happened was a
complete mystery to them. The first step in answering the question was
to plant a small tree in a large pot supported off the ground. They did this
so that the soil of the container was separated from the soil of the earth.
Only the dirt in the pot was available to the plant.
The people cared for the plant during one year. At the end of the year
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1. What do you think the experimenters considered as two possible
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tree growth?…
Life requires energy. Describe the basic principles of bioenergetics in an animal cell. How is the flow and transformation of energy different in a photosynthesizing cell? Include the role of ATP and enzymes in your discussion.
Chapter 11 Solutions
Becker's World of the Cell (9th Edition)
Ch. 11 - Both mitochondria and chloroplasts are...Ch. 11 - In the late 1800s, T. W. Engelmann illuminated...Ch. 11 - How do the type and arrangement of the various...Ch. 11 - An essential structural feature in both...Ch. 11 - Prob. 11.4CCCh. 11 - Explain how the Calvin cycle fixes three CO2...Ch. 11 - What are the major regulatory points in the Calvin...Ch. 11 - Although the typical chemical equation for...Ch. 11 - Prob. 11.8CCCh. 11 - True or False Indicate whether each of the...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Life requires energy. In a short essay (100–150 words), describe the basic principles of bioenergetics in an animal cell. How is the flow and transformation of energy different in a photosynthesizing cell? Include the role of ATP and enzymes in your discussion.arrow_forwardChemical energy. The diagram below shows a metabolic pathway that occurs in chloroplasts during photosynthesis. ribulose bisphosphate (RuBP) ADP + P₁ carbon dioxide (CO₂) 1 X HINEW ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCo) glucose triose phosphate (TP) State two features of metabolic pathways? two key features of metabolic pathways glycerate-3-phosphate (GP) are their -X ADP + P₁ interconnectednearrow_forward40 words or fewer. Explain why we would not survive without primary producers, in particular photosynthetic organisms. Be as complete and specific as possible within the word limit.arrow_forward
- Small explanation please. what is a product in the first stage of the Q- cycle? a. two electrons b. Q- cation c. cyt c (oxidized) d. two more protons in the matrix e. Q- radical anionarrow_forwardAtp bookkeeping. Explain where the number of 38 and 32 atp per glucose molecules comes fromarrow_forwardRET or FRET. Resonance energy transfer: a. Results in separation of charge. b. Powers ATP synthesis. c. Allows energy flux in the light-harvesting complex. d. Does not existarrow_forward
- The last stop. The final electron acceptor for the electron-transport chain is which of the following? do a. 0202 b. Coenzyme Q с. СО2СО, d. NAD+NAD+arrow_forwardHelp is appreciated. Think of an unusual eukaryotic species in which its ATP synthase has 12 subunits for its c ring. How many ATP molecules can be produced per pair of electrons that traverse the respiratory chian starting at Complex I? A. 2 ATP/2e- B. 1 ATP/2e- C. 0.5 ATP/2e- D. 1.5 ATP/2e- E. 3 ATP/2e-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. During photorespiration, Rubisco acts as carboxylase that catalyzes the reaction of RuBP and oxygen to form phosphoglycolate and PGA in the chloroplast.arrow_forward
- Cost effective? C3C3 plants require 18 molecules of ATP to synthesize 1 molecule of glucose. C4C4 plants, on the other hand, require 30 molecules of ATP to synthesize 1 molecule of glucose. Why would any plant use C4C4 metabolism instead of C3C3 metabolism given that C3C3 metabolism is so much more efficient?arrow_forwardplease help with this question. I am stuck. I listed the graph below ! Exergonic reactions such as the breakdown of ATP, are said to be “spontaneous.” However, by themselves, even exergonic reactions often proceed very slowly. What part of the curve helps to explain this?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. Triose phosphate is considered as the net product of the Calvin cycle of photosynthesis, which is then utilized for the synthesis of the end products that are glucose and starch.arrow_forward
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