Cellular Respiration & Energy Production quiz

To generate ATP from glucose This process produces approximately 36-38 ATP molecules from one glucose molecule through aerobic respiration

Mitochondrial matrix The matrix provides the perfect environment for the cycle, containing all necessary enzymes and coenzymes

Lactic acid fermentation This process allows muscles to continue functioning when oxygen is limited, though it leads to muscle fatigue

Glycolysis Glycolysis occurs in the cytoplasm and doesn't require oxygen, making it one of the oldest metabolic pathways in evolution

NADH NADH is often called the cellular currency of electrons, carrying high-energy electrons from one reaction to another

Electron transport chain The ETC produces about 34 ATP molecules, while glycolysis only produces 2 ATP directly

Oxygen Oxygen's high electronegativity makes it the perfect final electron acceptor, forming water as the end product

Glucose Glucose is actually broken down before the Krebs cycle begins, being converted to pyruvate during glycolysis

It undergoes fermentation Fermentation allows cells to continue producing ATP when oxygen is unavailable, though much less efficiently

Mitochondrion Mitochondria have their own DNA and are thought to have originated from ancient bacteria through endosymbiosis

Produce ATP using proton gradient ATP synthase acts like a molecular motor, rotating as protons flow through it to generate ATP

It requires oxygen Anaerobic respiration, by definition, occurs without oxygen and typically produces only 2 ATP molecules per glucose

They become CO2 All six carbon atoms from glucose are eventually released as CO2, showing complete oxidation of the molecule

Direct transfer of phosphate to ADP This process occurs in both glycolysis and the Krebs cycle, providing a quick but limited source of ATP

Glucose Glucose is gradually oxidized through multiple steps, losing electrons and hydrogen atoms in the process

Proton gradient generating ATP This Nobel Prize-winning theory explains how proton gradients drive ATP synthesis in both respiration and photosynthesis

Electron transport chain The ETC occurs in the inner mitochondrial membrane, where its components are arranged in a specific sequence

Amount of oxygen available Oxygen availability determines whether cells can perform efficient aerobic respiration or must resort to less efficient anaerobic processes

Pyruvate Pyruvate links glycolysis to the Krebs cycle, being converted to acetyl-CoA in the process

Final electron acceptor Oxygen's role as the final electron acceptor allows the electron transport chain to continue functioning, maintaining the proton gradient