Question

In the citric acid cycle (also known as the Krebs cycle), acetyl CoA is completely oxidized. From the following compounds involved in cellular respiration, choose those that are the net inputs and net outputs of the citric acid cycle.

ADP, ATP, pyruvate, O2, H20, acetyl CoA, NADH, NAD+, glucose, coenzyme A, CO2

Answer 1

Kreb Cycle

Explanation:

Citric acid cycle or the Kreb cycle is an oxidative pathway which completely oxidize acetyl coenzyme A(CoA) in form of CO2 and produce NADH,FADH2 and GTP(ATP)

• Kreb cycle completely oxidize carbon of acetyl CoA
• One Kreb cycle gives of 4 pairs of hydrogen atom from 1 acetyl CoA
• Produce 1 GTP molecule during the formation of succinate
• 1 molecule of acetyl CoA gives 12 ATP
• Glucose gets converted into pyruvate through glycolysis and further pyruvate gets converted into acetyl CoA through pyruvate dehydrogenase complex
• This acetyl CoA enters into Kreb cycle and converts oxaloacetate into citrate
• Net inputs of Kreb cycle includes:Acetyl CoA,NAD+,H2O,ADP
• Net outputs of Kreb cycle includes:CO2,NADH,ATP,CoA

Answer 2

Answer:

(Inputs) 2Acetyl CoA + 6NAD+ + 2FAD + 2ADP + 2Pi + 2H20 → (outputs) 4CO2 + 6NADH + 6H+ + 4FADH2 + 2ATP + 2CoA