LABORATORY REVIEW
CELL RESPIRATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
30 ATP
|
|
|
40 ATP
|
|
|
20 ATP
|
|
|
10 ATP
|
Detailed explanation-1: -One molecule of NADH is equivalent to two ATP in the cytoplasm. One NADH molecule is equivalent to three ATP molecules inside the mitochondria. Hence, in total 30 ATP molecules are generated by 10 NADH molecules during aerobic respiration.
Detailed explanation-2: -Answer and Explanation: 30 ATP are produced from the 10 NADH that are formed during the citric acid cycle. This is due to the fact that for each NADH molecule 3 ATP are produced from the electron transport chain.
Detailed explanation-3: -The oxidation of one molecule of NADH thus leads to the synthesis of three molecules of ATP, whereas the oxidation of FADH2, which enters the electron transport chain at complex II, yields only two ATP molecules.
Detailed explanation-4: -The net energy output for one glucose molecule from glycolysis through the Krebs cycle is: 4 ATP, 10 NADH + H+, and 2 FADH2.
Detailed explanation-5: -ATP-synthase synthesizes 1 ATP for 4 H+ ions. Therefore, 1 NADH = 10 H+, and 10/4 H+ per ATP = 2.5 ATP per NADH (**some sources round up**).