AP BIOLOGY

CELL RESPIRATION

AEROBIC RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many molecules of acetyl coA will enter the Krebs cycle per glucose molecule?
A
1
B
2
C
3
D
4
Explanation: 

Detailed explanation-1: -Each glucose molecule produces two molecules of acetyl CoA, enough for two cycles.

Detailed explanation-2: -Two acetyl-CoA molecules enter the cycle, and each has two carbon atoms, so four carbon dioxide molecules will form.

Detailed explanation-3: -Two molecules of carbon are created per cycle, along with three molecules of NADH, one molecule of FADH2, and one molecule of ATP or GTP. Each glucose molecule generates two acetyl CoA molecules, enough for two cycles.

Detailed explanation-4: -Krebs cycle produces the following: Two molecules of carbon dioxide are given off. One molecule of ATP is formed. Three molecules of NADH are produced.

Detailed explanation-5: -In the Krebs cycle, two ATP, six NADH +H+, and two FADH2 were produced. A net of four ATPs was produced from glycolysis through the Krebs cycle. More ATP will be produced from reduced coenzymes in the mitochondria during the electron transport chain and oxidative phosphorylation.

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