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Chapter 4.4, 7.1b, 7.2

Biology 1002B Chapter Notes - Chapter 4.4, 7.1b, 7.2: Catabolism, Radiant Energy, Anabolism


Department
Biology
Course Code
BIOL 1002B
Professor
Tom Haffie
Chapter
4.4, 7.1b, 7.2

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GSA 5 OUTCOMES
1. Characteristics of a catabolic versus anabolic pathway (relation to
delta G)
Catabolic pathway:
oType of metabolic pathway in which energy is released by the
breakdown of complex molecules to simpler molecules
oEnergy is released
oFree energy of the nal products of the pathway is less than the free
energy of the starting molecules
Anabolic pathway:
oType of metabolic pathway in which energy is consumed to build
complicated molecules from simpler ones (biosynthetic pathway)
oRequires energy
oFree energy of the products is greater than the free energy of the
starting molecules
oResults in formation of new covalent bonds
The energy that a biosynthetic pathway requires comes from the catabolic
breakdown of high-energy molecules.
The type of chemical energy that links the 2 types of pathways together is
ATP (adenosine triphosphate)
2. Two phases of photosynthesis...what links them
Two phases: light reactions and the Calvin cycle
Light reactions:
oCapture of light energy by pigment molecules
oUtilization of that energy to synthesize NADPH and ATP
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