AP Biology Unit 3: Cellular Energetics Review

Front

What is Cellular Energetics?

Back

Cellular Energetics refers to the study of how cells obtain and use energy to perform work, including processes like cellular respiration and photosynthesis.

Front

What is the role of enzymes in biochemical reactions?

Back

Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur.

Front

What is the Krebs Cycle?

Back

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

Front

What are the main products of the Krebs Cycle?

Back

The main products of the Krebs Cycle are NADH, FADH2, carbon dioxide, and ATP.

Front

What is chemiosmosis?

Back

Chemiosmosis is the process by which protons diffuse across a membrane, driving the synthesis of ATP via ATP synthase.

Front

What is ATP synthase?

Back

ATP synthase is an enzyme that creates ATP from ADP and inorganic phosphate, powered by the flow of protons across a membrane.

Front

What is the electron transport chain?

Back

The electron transport chain is a series of protein complexes in the inner mitochondrial membrane that transfer electrons and pump protons to create a proton gradient.

Front

How do competitive inhibitors affect enzyme activity?

Back

Competitive inhibitors bind to the active site of an enzyme, preventing substrate binding and thus decreasing the rate of reaction.

Front

What is the difference between competitive and non-competitive inhibitors?

Back

Competitive inhibitors bind to the active site, while non-competitive inhibitors bind to an allosteric site, altering enzyme function without competing for the active site.

Front

What is the significance of proton gradients in cellular energetics?

Back

Proton gradients are essential for ATP production in both cellular respiration and photosynthesis, as they drive the synthesis of ATP through chemiosmosis.