Name Jenna Abusad
The Process of Cellular Respiration
Describe what happens during glycolysis.
Describe what happens during the Krebs cycle.
Explain how high-energy electrons are used by the electron transport chain.
Identify how much ATP cellular respiration generates.
literally means “sugar-breaking.” The end result
is 2 molecules of a 3-carbon molecule called pyruvic acid.
2 ATP molecules are used at the start of glycolysis to get the process started.
High-energy electrons are passed to the electron carrier
, forming two molecules of
4 ATP are synthesized during glycolysis for a net gain of 2 ATP.
The Krebs Cycle
The second stage of cellular respiration is the
operates only when oxygen is available. The Krebs cycle is a series of energy-extracting
Pyruvic acid produced by glycolysis enters mitochondria. In the innermost compartment
of a mitochondrion, or the
, pyruvic acid molecules are broken down into carbon
dioxide and acetyl-CoA molecules.