Cellular Respiration

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What is cellular respiration?

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.

Where does cellular respiration occur?

Cellular respiration primarily occurs in the mitochondria of cells.

What are the three main stages of cellular respiration?

The three stages are Glycolysis, the Krebs Cycle, and Oxidative Phosphorylation.

What is glycolysis?

Glycolysis is the first stage of cellular respiration, breaking down glucose into pyruvate.

What is the Krebs Cycle?

The Krebs Cycle is a series of reactions that generate electron carriers from pyruvate in cellular respiration.

What is oxidative phosphorylation?

Oxidative phosphorylation is the stage of cellular respiration where ATP is produced using an electron transport chain.

What is the main purpose of cellular respiration?

The main purpose of cellular respiration is to convert biochemical energy from nutrients into ATP, a usable energy form for cells.

What are the products of cellular respiration?

The products are ATP, carbon dioxide, and water.

How is the mitochondria involved in cellular respiration?

Mitochondria host most stages of cellular respiration, particularly the Krebs Cycle and oxidative phosphorylation.

What role does oxygen play in cellular respiration?

Oxygen is the final electron acceptor in the electron transport chain, forming water.

How do cells produce energy without oxygen?

Cells can produce energy without oxygen through anaerobic respiration or fermentation.

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

NADH and FADH₂ carry electrons to the electron transport chain, facilitating ATP production.

How is the energy from glucose captured in cellular respiration?

Energy from glucose is captured through the breakdown of chemical bonds, forming ATP during glycolysis and oxidative phosphorylation.

What impacts can temperature have on cellular respiration?

Temperature affects enzyme activity; moderate temperatures optimize cellular respiration while extremes decrease efficiency.

What happens during the electron transport chain?

During the electron transport chain, electrons are transferred through proteins, releasing energy to pump protons and produce ATP.

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