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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Question
Chapter 20, Problem 13P
Interpretation Introduction
Interpretation:
The change in the level of 3-phosphoglycerate and ribulose 1, 5-biphosphate in the next minute as the light is switched off suddenly.
Concept introduction:
It has been suggested that light-dark switch in the activity of enzymes allows the reactions of photosynthesis and glycolysis to take place in light and dark respectively having the same enzymatic apparatus. Ribulose 1, 5-bisphosphate is an organic compound involved in the Calvin cycle of photosynthesis.
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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)
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photosynthesis.
Historical Discovery Process
The chemical changes that occur during photosynthesis have been
investigated for the past 300 years. The general highlights of these
discoveries help us to understand the basic process of photosynthesis.
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
the small tree had gained 100 kg. (The actual data from this experiment
have been changed to simplify the discussion.)
1. What do you think the experimenters considered as two possible
sources for the substances (matter) that became incorporated into new
tree growth?…
The light phase of photosynthesis at the molecular...
Photosystem II
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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
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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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