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 derived from carbohydrates, fats, and proteins.

Front

How many CO₂ molecules are produced by the Krebs Cycle for one molecule of glucose?

Back

4 CO₂ molecules are produced.

Front

How many ATP molecules are produced from one turn of the Krebs Cycle?

Back

2 ATP molecules are produced.

Front

What are the main electron carriers produced in the Krebs Cycle?

Back

NADH and FADH₂ are the main electron carriers produced.

Front

Which molecule is not a requirement for the Krebs Cycle?

Back

Pyruvate is not a requirement; acetyl-CoA is needed instead.

Front

What type of respiration is the Krebs Cycle a part of?

Back

The Krebs Cycle is part of aerobic respiration.

Front

What are the folds in the mitochondrion called?

Back

The folds in the mitochondrion are called cristae.

Front

What is the primary purpose of the Krebs Cycle?

Back

The primary purpose of the Krebs Cycle is to produce energy in the form of ATP and to generate electron carriers for the electron transport chain.

Front

What is the starting molecule for the Krebs Cycle?

Back

The starting molecule for the Krebs Cycle is acetyl-CoA.

Front

What is produced during the Krebs Cycle besides ATP?

Back

Besides ATP, the Krebs Cycle produces NADH, FADH₂, and CO₂.