AP BIOLOGY

CELL RESPIRATION

THE KREBS CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the products of the Krebs cycle?
A
CO2, H2O, and ATP
B
ATP, CO2, NADH, and FADH2
C
CO2, H2O, and glucose
D
NADH, H2O, FADH2, and ATP
Explanation: 

Detailed explanation-1: -To summarize, for complete oxidation of a glucose molecule, Krebs cycle yields 4 CO2, 6NADH, 2 FADH2 and 2 ATPs. Each molecule of NADH can form 2-3 ATPs and each FADH2 gives 2 ATPs on oxidation in the electron transport chain.

Detailed explanation-2: -For one cycle, two molecules of carbon, three molecules of NADH, one molecule of FADH2 and one molecule of ATP or GTP are produced.

Detailed explanation-3: -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.

Detailed explanation-4: -FADH2 and NADH are created from FAD and NAD+ through reduction-oxidation reactions in the Krebs cycle during respiration as seen below: This cycle gives off small amounts of energy in the form of adenosine triphosphate, or ATP, and produces these compounds, FADH2 and NADH.

Detailed explanation-5: -Krebs cycle produces the following: Two molecules of carbon dioxide are given off. One molecule of ATP is formed.

There is 1 question to complete.