AP BIOLOGY

CELL RESPIRATION

GLYCOLYSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many NAD are used during both turns of the Krebs Cycle?
A
8
B
2
C
6
D
4
Explanation: 

Detailed explanation-1: -Two molecules of acetyl-CoA are produced from each glucose molecule so two turns of the Krebs cycle are required which yields four CO2, six NADH, two FADH2 and two ATPs.

Detailed explanation-2: -All told, the Krebs cycle forms (per two molecules of pyruvic acid) two ATP molecules, ten NADH molecules, and two FADH2 molecules.

Detailed explanation-3: -Answer and Explanation: For each turn of the citric acid cycle there are three molecules of NADH + H+ produced.

Detailed explanation-4: -So using this information, we can tally up the total amount of reduced NAD produced by one turn of the Krebs cycle. Our correct answer is three molecules of reduced NAD are produced.

Detailed explanation-5: -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.

There is 1 question to complete.