2027/ Chem 210 BIOCHEMISTRY Final Exam
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Chem 210 BIOCHEMISTRY Final Practice Exam With
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cellular respiration - ANSWER-In cellular respiration,
glucose is also completely oxidized into carbon dioxide,
but not all at once as in direct combustion. Instead, the
process occurs over many smaller, enzyme-catalyzed
steps, each releasing a relatively small amount of energy.
And unlike combustion ( the all-at-once release of free
, energy from this reaction would incinerate a cell), these
packets of energy are not all released as heat, but can be
stored within the chemical bonds of other molecules, the
most important of which is adenosine triphosphate (ATP).
ATP is generated through two major mechanisms? -
ANSWER-In cellular respiration, ATP is produced by two
different mechanisms. In substrate-level phosphorylation,
ATP is formed when a phosphate group is directly
transferred to ADP from another molecule. In oxidative
phosphorylation, ATP production is coupled to the
oxidation of the electron carriers NADH and FADH2 and
the generation of a proton gradient.