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 11.5PS
Energy Flow in Photosynthesis. A portion of the solar energy that arrives at the surface of a leaf is eventually converted to chemical energy and appears in the
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Chemical 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
interconnectedne
Photosynthesis. Complete the following statements. Write your answer in the
spaces provided.
The plant uses the
to grow new
flowers and
flower
The leaf releases
into the air,
and
breathe this in.
stem
The leaves absorb
this as energy to mix
and use
and
leaf
The leaf has holes underneath it
and
called
are
that let
mixed by the leaf to make
into the leaf.
(plant food) and
Humans and animals breathe
reots
The
suck up
from the soil. The
water then travels up the
to the leaves.
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?
What would happen if the isolated chloroplasts were shifted to a lower pH solution?
What would be the results if the above experiments were performed in the presence of light?
If these experiments were performed in mitochondria instead of chloroplasts, what results would we expect?
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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- 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. A cyclic pathway runs in Photosystem I to make ATP. Here, electrons are cycled back to photosystem I and NADPH is formed.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. Plants use light energy mostly in the invisible light range for photosynthesis.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
- QI. Drag and drop into each box in the biological passage the correct answer. The Plant Kingdom is composed of multicellular organisms which are auto-photosynthetic and There are two other groups of organisms which are called traced back Some members are photosynthetic but primarily unicellular. The characteristics of the organisms can be which determines structural changes. For example, the present-day zebras have stripes or lines from the neck to the upper extremities brought about by small change in the pool hence changes are not noticeable. This process of evolution is called natural selection autotrophic protists gene phylogenetically gradualism macroevolution punctuated equilibrium heterotrophicarrow_forwardThe 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_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
- 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. Chlorophyll a that is bright green in color is the pigment that initiates the light dependent reactions of photosynthesisarrow_forwardPhotosyntheis 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.arrow_forwardLife 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.arrow_forward
- Photosynthesis and Respiration: Explain the details of the light-dependent reaction. Make sure you provide the details as to how all three products are made and where this reaction takes place.arrow_forwardLife 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_forwardTrue or False? The following is the correct sequence for the movement of electrons during the light-dependent reactions of plants: A) P680 --> P700 --> water --> NADP+ In cellular metabolism, photosynthesis uses solar energy to produce energy-rich organics; respiration breaks down energy-rich organics to synthesize ATParrow_forward
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