2.27 Krebs Cycle

Front

What is Acetyl-CoA?

Back

Acetyl-CoA is an energy-rich molecule formed from pyruvate before entering the Krebs Cycle. It consists of an acetyl group attached to coenzyme A.

Front

How many FADH2 molecules are produced from one molecule of glucose in the Krebs Cycle?

Back

2 FADH2 molecules are produced from one molecule of glucose during the Krebs Cycle.

Front

Where does the Krebs Cycle take place in the cell?

Back

The Krebs Cycle takes place in the mitochondrial matrix.

Front

What are the requirements for the Krebs Cycle?

Back

The Krebs Cycle requires NAD+, FAD+, and water, but not pyruvate.

Front

What happens to the energy from glucose after the Krebs Cycle?

Back

After the Krebs Cycle, most of the usable energy from glucose is contained in NADH and FADH2.

Front

What is the main purpose of the Krebs Cycle?

Back

The main purpose of the Krebs Cycle is to produce energy carriers (NADH and FADH2) and ATP through the oxidation of acetyl-CoA.

Front

What is the role of NAD+ in the Krebs Cycle?

Back

NAD+ acts as an electron carrier, accepting electrons during the oxidation of substrates in the Krebs Cycle.

Front

What is the significance of FAD in the Krebs Cycle?

Back

FAD is another electron carrier that is reduced to FADH2 during the Krebs Cycle, contributing to the electron transport chain.

Front

What is citrate in the context of the Krebs Cycle?

Back

Citrate is the first product formed in the Krebs Cycle when acetyl-CoA combines with oxaloacetate.

Front

What is oxaloacetate?

Back

Oxaloacetate is a four-carbon molecule that combines with acetyl-CoA to initiate the Krebs Cycle.