Biochemistry : NADH and FADH2
Study concepts, example questions & explanations for Biochemistry
All Biochemistry Resources
Example Questions
Example Question #1 : Nadh And Fadh2
The coenzymes that are used in the production of ATP via the electron transport train are created during __________.
glycolysis only
fermentation only
Krebs cycle only
glycolysis and Krebs cycle
glycolysis and Krebs cycle
The coenzymes being referred to are 
The lone reaction that produces 
Example Question #152 : Catabolic Pathways And Metabolism
How many molecules of ATP are produced via glycolysis when starting with one molecule of glucose?
Four
Six
Three
Two
Four
Four total molecules of ATP are produced during glycolysis. Note that all of these ATP molecules are created via substrate-level phosphorylation and were made anaerobically. Recall that there are two steps in glycolysis that require ATP as a reactant, and thus, the net ATP production is two ATP per molecule of glucose.
Example Question #3 : Nadh And Fadh2
The electron carrier 
I. Succinyl-CoA synthetase
II. Succinate dehydrogenase
III. Mitochondrial glycerol-3-phosphate dehydrogenase 2
IV. Aconitase.
I, II, and IV
IV only
II and III
I and II
I, II, and III
II and III
In the citric acid cycle, succinate dehydrogenase converts succinate to fumarate with the production also of a molecule of 
Example Question #1 : Nadh And Fadh2
A single NADH has the potential to eventually supply two different ATP amounts. Which of the following ATP values are accurate, and correctly match the value to the site of the body in which those values occur?
Skeletal muscle: 2 ATP
Heart and liver: 1 ATP
Skeletal muscle: 1 ATP
Heart and liver: 2 ATP
Skeletal muscle: 1.5 ATP
Heart and liver: 2.5 ATP
The amount of ATP from NADH is the same from the muscle, and the heart and liver.
Skeletal muscle: 2.5 ATP
Heart and liver: 1.5 ATP
Skeletal muscle: 1.5 ATP
Heart and liver: 2.5 ATP
The ATP yield from NADH is dependent on how the electrons from the cytoplasmic (glycolytic) NADH are transported into the mitochondria. In muscle, the glycerol-phosphate shuttle occurs, which results in 1.5 ATP per NADH. However, in the heart and liver, the malate-aspartate shuttle occurs, resulting in 2.5 ATP per NADH. This difference explains why some sources list the net ATP from glucose catabolism as 30 ATP, while others list 32 ATP.
All Biochemistry Resources
