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Chapter 9 Slides.pdf
Chapter_9_Slides.pdf
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Chapter 9 Slides.pdf-LECTURE PRESENTATIONS For CAM...
Chapter_9_Slides.pdf-LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH
Chapter 9 Slides.pdf-LECTURE PRESEN...
Chapter_9_Slides.pdf-LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH
Page 12
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12
Figure 9.19
Carbohydrates
Proteins
Fatty
acids
Amino
acids
Sugars
Fats
Glycerol
Glycolysis
Glucose
Glyceraldehyde 3- P
NH
3
Pyruvate
Acetyl CoA
Citric
acid
cycle
Oxidative
phosphorylation
The Versatility of
Catabolism
Learn this figure for exams
Biosynthesis (Anabolic Pathways)
•
The body uses small molecules to build other
substances
•
These small molecules
–
may come directly from food
–
from glycolysis, or from the citric acid cycle
•
Many of the pathways in Figure 9.19
(previous slide) are
reversible
to allow the
production of
–
carbohydrates, proteins, and fats
© 2011 Pearson Education, Inc.
Regulation of Cellular Respiration via
Feedback Mechanisms
•
Feedback inhibition is the most common
mechanism for control
–
If ATP concentration begins to drop, respiration
speeds up
–
when there is plenty of ATP, respiration slows
down
•
Control of catabolism is based mainly on
regulating the activity of enzymes
–
at strategic points in the catabolic pathway
© 2011 Pearson Education, Inc.
Figure 9.20
Control of respiration
•
An example of the control
of cellular respiration
•
Phosphofructokinase is
an allosteric enzyme
•
(AMP is a precursor to ADP, a
precursor to ATP)
•
Why would ATP and Citrate inhibit
an early step in the pathway?
•
Why would AMP stimulate this
same step?
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