Cellular Respiration Flashcards
What are the two fundamental chemical reactions that power metabolism?
Respiration and Fermentation
The hydrolysis of what molecule provides the chemical energy that powers most cells.
Adenosine Triphosphate
Energy to make ATP comes from oxidation of
Sugars
What is the most important source of chemical potential energy in cells?
Electrons
The transfer of a phosphate group from ATP to a protein is exergonic or endergonic?
Exergonic
C-O bonds have ___ potential energy
Low
C-H bonds have _____ potential energy
High
Oxidation of 1 mole of glucose released how many calories of energy?
686 kcal
Glucose break down results in what 3 things?
-Two pyruvates-Two units of ATP-Two electron carriers NADH
How many ATP molecules are initially invested in glycolysis?
2 molecules.
How many total ATP molecules are produced by glycolysis, and what is the net gain of ATP?
Total=4 molecules, net gain=2
Occurs when ATP is produced by the enzyme-catalyzed transfer of a phosphate group from an intermediate substrate to ADP
Substrate-Level Phosphorylation
Which two possible pathways can occur after glycolysis?
- Krebs Cycle -> Oxidative Phosphorylation2. Fermentation
Inside the mitochondria, pyruvate reacts with coenzyme A to produce
Acetyl CoA
In the presence of O2, the pyruvate enters the
Krebs Cycle
