AP Biology Unit 3 Cellular Respiration

Front

What are the three main stages of cellular respiration?

Back

1. Glycolysis 2. Krebs Cycle 3. Oxidative Phosphorylation

Front

What is glycolysis?

Back

The first step of cellular respiration that breaks down glucose into two molecules of pyruvate, producing a small amount of ATP and NADH.

Front

What is the Krebs Cycle also known as?

Back

Citric Acid Cycle or Tricarboxylic Acid (TCA) Cycle.

Front

Where does glycolysis occur?

Back

In the cytosol of the cell.

Front

What is the main purpose of the Krebs Cycle?

Back

To complete the breakdown of glucose and produce electron carriers (NADH and FADH2) for the electron transport chain.

Front

What are the products of the Krebs Cycle per glucose molecule?

Back

3 NADH, 1 FADH2, 1 ATP (or GTP), and 2 CO2.

Front

What is oxidative phosphorylation?

Back

The final stage of cellular respiration where ATP is produced using the energy from the electron transport chain and the proton gradient.

Front

Where does oxidative phosphorylation take place?

Back

In the mitochondrial cristae.

Front

What is the role of oxygen in cellular respiration?

Back

Oxygen acts as the final electron acceptor in the electron transport chain during oxidative phosphorylation.

Front

What is the output of oxidative phosphorylation?

Back

ATP, water (H2O) as a byproduct.