Review Cellular Respiration 2

Under ideal conditions each NADH molecule will result in three ATP molecules, and each FADH2 molecule will result in two ATP molecules during oxidative phosphorylation. Calculate the total number of ATP molecules that might be produced in this phase of cellular respiration from one glucose molecule.

34 ATP molecules might be produced in this phase of cellular respiration from one glucose molecule.

Considering all the stages of cellular respiration (glycolysis, link, Krebs cycle, and oxidative phosphorylation) how many ATP molecules that might be produced from one glucose molecule, assuming ideal circumstances?

38 ATP molecules are produced from one glucose molecule.

During oxidative phosphorylation, what molecule is being phosphorylated?

ADP+Pi is being phosphorylated.

Because of its role in aerobic respiration, oxygen is essential for most living things on earth. In complete sentences, describe the role of molecular oxygen (O2) in aerobic respiration.

Electrons are given to oxygen in aerobic respiration because the electron transport chain shuts down without O2.

Why is energy required to move the hydrogen ions across the membrane?

Energy is required to move the hydrogen ions across the membrane because the hydrogen ions are moving against the concentration gradient.

When is glucose used?

Glucose is used during glycolysis in the cytoplasm.

What compound is formed as a final product of the electron transport chain?

H2O (water) is formed as a final product of the electron transport chain.

Describe the movement of hydrogen ions through the membrane.

Hydrogen ions diffuse through ATP synthase.

High potential energy electrons provide the energy necessary to pump hydrogen ions across the inner mitochondrial membrane. What molecules carry these high potential energy electrons?

NADH and FADH2 carry these high potential energy electrons.

Is any ATP produced in the electron transport chain?

No ATP is produced in the electron transport chain.

Would free energy be required for the hydrogen ions to move with the concentration gradient?

No, free energy would not be required for the hydrogen ions to move with the concentration gradient.

Is any ATP used in the electron transport chain?

No, the electrons provide energy.

What molecule is the final electron acceptor after the electron has moved through the electron transport chain?

Oxygen is the final electron acceptor after the electron has moved through the electron transport chain.

When are the 38 ATPs produced?

The 38 ATPs are produced during all the stages of cellular respiration in the cytoplasm and mitochondria.

When are the 6 carbon dioxides produced?

The 6 carbon dioxides are produced during glycolysis in the matrix and cytoplasm.

When are the 6 oxygens used?

The 6 oxygens are used in the electron transport chain in the mitochondria.

When are the 6 waters produced?

The 6 waters are produced in the electron transport chain in the matrix and inner membrane of the mitochondria.

Where is the highest concentration of hydrogen ions located?

The highest concentration of hydrogen ions is located in the inter-membrane space.

How do hydrogen ions get to the inter-membrane space?

The hydrogen ions reach the inter-membrane space through protein channels embedded in the mitochondrial membrane.

What is the name of the embedded protein that provides a channel for the hydrogen ions to pass through the membrane?

The name of the embedded protein that provides a channel for the hydrogen ions to pass through the membrane is ATP synthase.

The flow of hydrogen ions through the protein channel provides free energy to do work. What process in chemiosmosis requires energy?

The phosphorylation of ADP requires free energy.

Is the release of an electron from one of these electron acceptor molecules oxidation or reduction?

The release of an electron from one of these electron acceptor molecules is oxidation.

Where did these electron acceptor molecules come from?

These molecules were produced during glycolysis, the link reaction, and the Kreb's cycle.

When the electrons are released from the electron acceptor molecules, what else is produced?

When the electrons are released from the electron acceptor molecules, H+ is produced.