Krebs' Cycle

Front

What is the 'regenerator' of the Krebs Cycle?

Back

Oxaloacetate is the 'regenerator' of the Krebs Cycle, as it is regenerated at the end of the cycle to combine with Acetyl-CoA to start the cycle again.

Front

What happens to pyruvate before it enters the Krebs Cycle?

Back

Before entering the Krebs Cycle, pyruvate is oxidized to form Acetyl-CoA.

Front

How many FADH₂ molecules are produced by 1 molecule of glucose during the Krebs Cycle?

Back

2 FADH₂ molecules are produced from 1 molecule of glucose during the Krebs Cycle.

Front

How many ATP molecules are produced from the Krebs Cycle?

Back

The Krebs Cycle produces 2 ATP molecules.

Front

After the Krebs Cycle, where is the majority of usable energy from glucose contained?

Back

The majority of usable energy after the Krebs Cycle is contained in NADH and FADH₂.

Front

What is the primary function of the Krebs Cycle?

Back

The primary function of the Krebs Cycle is to generate energy through the oxidation of Acetyl-CoA, producing NADH, FADH₂, and ATP.

Front

What are the main products of one turn of the Krebs Cycle?

Back

One turn of the Krebs Cycle produces 3 NADH, 1 FADH₂, and 1 ATP (or GTP), along with 2 CO₂.

Front

What role does Acetyl-CoA play in the Krebs Cycle?

Back

Acetyl-CoA is the starting substrate for the Krebs Cycle, combining with oxaloacetate to form citrate.

Front

What is the significance of NADH and FADH₂ in cellular respiration?

Back

NADH and FADH₂ are crucial electron carriers that transport electrons to the electron transport chain, leading to ATP production.

Front

What is the relationship between the Krebs Cycle and aerobic respiration?

Back

The Krebs Cycle is a key component of aerobic respiration, occurring in the mitochondria and requiring oxygen to fully oxidize glucose.