Krebs Cycle

Front

What is the Krebs Cycle?

Back

The Krebs Cycle, also known as the citric acid cycle or TCA cycle, is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetyl-CoA.

Front

Where does the Krebs Cycle occur in the cell?

Back

The Krebs Cycle takes place in the mitochondria of the cell.

Front

What is the starting molecule for the Krebs Cycle?

Back

The starting molecule for the Krebs Cycle is acetyl-CoA, which is derived from pyruvate.

Front

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

Back

The main products of one turn of the Krebs Cycle are 3 NADH, 1 FADH2, 1 ATP (or GTP), and 2 CO2.

Front

How many times does the Krebs Cycle turn for each glucose molecule?

Back

The Krebs Cycle turns twice for each glucose molecule.

Front

What role do NADH and FADH2 play in cellular respiration?

Back

NADH and FADH2 are electron carriers that transport electrons to the electron transport chain (ETC) for ATP production.

Front

What is the significance of the electron transport chain (ETC)?

Back

The electron transport chain is the final stage of cellular respiration where the energy from electrons is used to produce ATP.

Front

What is the role of oxygen in the Krebs Cycle?

Back

Oxygen is not directly used in the Krebs Cycle, but it is essential for the electron transport chain, where it acts as the final electron acceptor.

Front

What is citric acid's role in the Krebs Cycle?

Back

Citric acid is formed when acetyl-CoA combines with oxaloacetate, and it is the first product of the Krebs Cycle.

Front

What happens to carbon atoms during the Krebs Cycle?

Back

Carbon atoms from acetyl-CoA are released as carbon dioxide (CO2) during the Krebs Cycle.