Cellular Respiration Quiz & Flashcards

Glycolysis occurs in the cytoplasm, while the other stages occur in the mitochondria.

The electron transport chain creates a proton gradient across the mitochondrial membrane.

Oxygen is the final electron acceptor, forming water when it combines with electrons and protons.

Glycolysis results in a net gain of 2 ATP per glucose molecule.

Oxidative phosphorylation is the process that generates ATP using the electron transport chain.

NADH is a major product of the Krebs Cycle that donates electrons to the electron transport chain.

Cyanide blocks the electron transport chain by inhibiting cytochrome c oxidase.

Coenzyme A transfers acetyl groups into the Krebs Cycle.

In anaerobic conditions, pyruvate is reduced to lactic acid in muscle cells.

The electron transport chain is located in the inner mitochondrial membrane.

Glycolysis generates ATP and NADH from the breakdown of glucose.

High ATP levels inhibit phosphofructokinase, slowing glycolysis.

NADH is produced in the Krebs Cycle, which is used in the electron transport chain.

Most ATP in cellular respiration is produced by oxidative phosphorylation.

Oxygen accepts electrons at the end of the electron transport chain, forming water.

The Krebs Cycle involves a series of oxidation-reduction reactions generating electron carriers.

Electrons lose energy as they move through the chain, which is used to pump protons.

Proton gradients provide the energy needed by ATP synthase to produce ATP.

Uncoupling proteins dissipate the proton gradient as heat, reducing ATP production.

Under anaerobic conditions, glycolysis ends with the production of lactic acid.

Fermentation regenerates NAD+ to sustain glycolysis in the absence of oxygen.

Glucose is the main substrate used in cellular respiration to produce ATP.

Oxygen inhibits fermentation as it enables aerobic respiration instead.

A proton gradient activates ATP synthase, allowing it to produce ATP.

Glucose is not a direct product of the Krebs Cycle; it's broken down into other molecules.

ATP supplies energy for various cellular processes and activities.

Pyruvate dehydrogenase catalyzes the conversion of pyruvate to acetyl-CoA.

Substrate-level phosphorylation generates ATP directly without the electron transport chain.

NADH donates electrons to the electron transport chain, which are used to produce ATP.

Temperature increases the rate of respiration until proteins denature, inhibiting the process.

Cellular respiration occurs continuously, not just at night, in both plants and animals.

The mitochondrial matrix is the location where the Krebs Cycle takes place.

The electron transport chain creates a proton gradient that drives ATP production via ATP synthase.

ATP synthase is powered by the proton gradient across the mitochondrial membrane.

Acetyl-CoA is a common intermediate that enters the Krebs Cycle from different metabolic pathways.

The energy from electrons is used to pump protons across the mitochondrial membrane.

FADH2 carries electrons to the electron transport chain, contributing to ATP production.

The electron transport chain produces the most ATP through oxidative phosphorylation.

Carbon atoms from glucose are released as carbon dioxide during cellular respiration.

Oxidative phosphorylation produces ATP using the electron transport chain and proton gradient.

Cytochrome c transfers electrons between complexes in the electron transport chain.

ATP is produced directly from ADP in glycolysis through substrate-level phosphorylation.

Fats are broken down into fatty acids and glycerol, entering cellular respiration pathways.

NAD+ carries electrons, becoming NADH during glycolysis, facilitating further energy production.

Without oxygen, the electron transport chain cannot function, stopping ATP production.

Mitochondria do not store glucose; they produce ATP through cellular respiration.

Fermentation regenerates NAD+ allowing glycolysis to continue in the absence of oxygen.

Oxidative stress causes damage to cells by generating reactive oxygen species.

Glycolysis occurs in the cytoplasm and does not require mitochondria.