AP BIOLOGY

CELL RESPIRATION

GLYCOLYSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
At the end of the Kreb’s cycle, where is most of the energy from the original glucose stored?
A
in CO2
B
in ATP
C
in NADH
D
in pyruvate
Explanation: 

Detailed explanation-1: -Answer and Explanation: At the end of the Krebs cycle, most of the energy from the glucose molecule being broken down d. has been transferred to the electron carriers NADH and FADH2.

Detailed explanation-2: -Fuel for the Krebs cycle comes from lipids (fats) and carbohydrates, which both produce the molecule acetyl coenzyme-A (acetyl-CoA).

Detailed explanation-3: -Results of the Krebs Cycle After the second turn through the Krebs cycle, the original glucose molecule has been broken down completely. All six of its carbon atoms have combined with oxygen to form carbon dioxide. The energy from its chemical bonds has been stored in a total of 16 energy-carrier molecules.

Detailed explanation-4: -At the end of Kreb’s cycle most of the energy is transferred to NADH2 & FADH2.

Detailed explanation-5: -When acetyl-CoA is oxidized to carbon dioxide in the Krebs cycle, chemical energy is released and captured in the form of 3 molecules of NADH, 1 molecule of FADH2, and 1 molecule of ATP.

There is 1 question to complete.